"clunk" when I brake..
 

05' 1500 4x4, and for a number of weeks now, we're experiencing the following:
On braking, you can hear a ..."clunk" coming from front left when you initially depress the pedal, and you can also feel the clunk
with yer braking foot.
I pulled the wheel off, and pulled on all components I could get my mitts on: didn't see or feel anything amiss.
It seems to brake ok aside from the above.

Any armchair troubleshooting advice?
Thanks lads,
Rich

Caliper binding?not moving parallel to rotor,a little cleaning needed on sliding parts

could be...thanks