Stab back at clubs (4)
I believe the answer is:
bats
'clubs' is the definition.
(bat is a kind of club)
'stab back' is the wordplay.
'back' shows that the letters should be reversed in order.
'stab' reversed gives 'BATS'.
'at' acts as a link.
(Other definitions for bats that I've seen before include "Bonkers (sl.)" , "Those striking" , "Mad; mammals" , "Crazy; night-fliers" , "Take a stab at the night creatures" .)