Yeah, what I'll usually do is "Find the business" like KStarr says and hang out until whatever it is relaxes. Then I'll stretch it out for however long it takes.
If I'm just stretching, I have been holding for anywhere from 90 seconds upwards of even 5 minutes or longer in some cases.
I know that Mike Robertson had noted he had some issues that were taking low level stretches of 20 minutes multiple times per day.
And if you don't think kettleball squat cleans are difficult, I say, step up to the med-ball
- CJ Kim