Chaos: If you can muscle up or upright row 250 (excellent weight) and into the 500's (also excellent) in the DL, than you have the potential power to clean 250. With technique (for you) focus on the quickness and speed of the starting pull from the floor. It is like a turbo charged pull over. Also focus on the revolving grip and the thrust of the elbows out as you "catch" the bar on the shoulders. Starting with even a empty is how a lot of Olympic lifters perfect their speed, timing and form. But if you feel confidence with the 135, than you might try that.
As far as the ass to the grass bottom position problem, try just squatting all the way down without any weight involved. That would be bwt squats. At the total bottom position, hold it there for a 10 second count and than come back up to the full standing position. This is learning to begin a full squat from a dead stop position. A whole different firing of muscle impulses is programed by the body that way. Try that for 12 to 15 reps, holding the bottom position for that ten seconds, each time. After a few workout doing free squats (all worked in with your regular leg plans) , begin using an empty bar, doing the same protocol. Keep adding weight to the bar as technique improves and you should be pretty near or equal to the 3/4 squats that most guy's do.
OldTimer#1: You say there are a only a few women (believe your original concept was 20 females), in this county who can clean 250, than that's what you believe. And as I had noted before, quite a few American women aren't interested in entering any Olympic meets, local or national. They are training for their selected sport(s) only. Go to any serious athletic training center and you will find some impressive women's gym lifts (cleans, jerks, benches, snatches, squats, etc) posted on the blackboards, usually hanging on the walls. And these lifts are changing all the time.
Having said that if a man can DL 300 for easy rep than a 250 clean is well withing his reach. Meaning the potential is clearly present, if the practice and learning of technique is applied. And in a somewhat short period of time, given all thing being equal. Like time to learn and practice and the total workout protocol, etc.
Being insane must be running wild among Olympic lifters, because, for the most part, their boots/shoes (different styes in lifting wear, as in lifting belts) have raised heels. Some quite high actually. Reason being that a raised heel tends to give better leverage and balance when doing cleans and snatches. All the while releasing some of the tension on the lower back. Which allows less danger of any serious injury to the lifter. So not believing that Chaos would want to invest in this style of very expensive foot gear, I suggested a common 2X4. Also believing that Chaos will not be dancing around the gym, but keeping both heels on the 2X4, when cleaning ,I though it might be a helpful suggestion.
So I guess you have your view and I have mine. No big deal. Good Luck.