Flipping game? (11)
I believe the answer is:
tiddlywinks
'flipping game?' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tiddlywinks that I've seen before include "Game of flicking disks" , "Children's game" , "Counter-flipping game" , "Game of flicking counters" , "Game of flipping counters" .)