Also while checking, when the bike is upside down or in a stand, try to work out if the clicking is in time with the pedals, ie the pedal is in the same place when the click occurs and it is one click every crank revolution.
If it is then the click will be somewhere in the pedal, the BB, the chain ring or the front mech touching something on the chain ring or crank.
Try spinning the pedal without moving the cranks to see if it is the pedal bearing.
If the click is less frequent then the turn of the cranks, ie every 2-3 turns you get a click then it could be the chain. There could be a stiff link that isn't flexing around the smaller sprockets on the back wheel or it could be a chain link pin just touching something like the rear mech cage.
While the moving bits are in the air give the chain a good wipe down and clean. There might be something caught in the chain or in the teeth of the sprockets.
Don't forget to check if there is anything on the frame that is touching the cranks or chain rings.
I was saying to Arch that her bike clicks on every turn too. When she turns a corner the toe clips on her pedals, that she doesn't clip into, clicks on the tarmac as she banks over.