Strike stopper (3)
I believe the answer is:
tap
This clue is a double definition.
'strike' is the first definition.
(tapping is a kind of striking)
'stopper' is the second definition.
(tap is a kind of stopper)
(Other definitions for tap that I've seen before include "Dancing" , "Knock or draw upon" , "Make use of; water from it" , "Light touch (hot or cold?)" , "Draw upon Pat" .)