Sound at front end under braking/deceleration

[Paul]

I got the front wheel off the floor and spun it several times.


I get a faint clicking or clacking (clacking is a better description) noise and it comes from the offside front caliper.


And here's the interesting bit:  It seems to be once every wheel rotation.


And it seems to be when the same point of the disc passes through the pads.


So I checked the offside front disc, and found........ absolutely nothing...... at least not yet.