Check other things first. Exhaust, swaybar endlinks, axle control arms, all those things can make a "clunk" if they're loose or worn out. The clutch is probably not a candidate for drivetrain slop, sorry.
On that note, once I bought a car for $150...the owner says to me, "It has a bad rear wheel bearing, when you go around a corner it clunks and squeals REAL bad, it's almost undriveable." I got under there, looked and it was the muffler clunking side to side and rubbing on the tire. One coat hanger and the problem was fixed...and I had a car to drive for $150.
Also, it's "yoke".