If it is a very consistent and rhythmic clicking, you are hearing your fuel injectors, and that's nothing to worry about.
Is your car still new or relatively new? I had a couple rat-a-tat-tats two summers ago, but most went away quickly (the new parts seating themselves).
Check around the torsion bar too. Maybe a foreign object got lodged on it, and clicks up (or back down) when the suspension flexes.