Since there are no drive train components in the rear of the vehicle there are limited possibilities. It may be a loose or broken shock absorber - it may be the exhaust pipe is hitting the frame of the car - it may be a worn out wheel bearing. Start eliminating those possiblities first.
When you turn the wheel, or while you drive?
Check for loose/worn steering components i.e. tie rod ends, ball joints
sounds like the right front motor mount .i replaced mine and the clunking sound went away
Tie rod might need replacement.
It does that when the engine is cooling off. It's called expansion and contraction.
probably a blown head gasket
No
STRUTS
how to remove hub assbley from car 2000 ford focus
Program a new key and ignition to a 2000 ford focus
yes
cv joint damage.repack or change it. repacking may do to solve your problem