Gets back at group involved in craven gesture (7)
I believe the answer is:
avenges
'gets back at' is the definition.
(I've seen this before)
'in craven gesture' is the wordplay.
'in' indicates the answer is hidden within the clue.
'AVENGES' is hidden in the letters of 'craven gesture'.
'group involved' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for avenges that I've seen before include "Makes reprisal" , "Retaliates for" , "Gets back at" , "Carries out retribution" , "Takes satisifaction for a wrongdoing or injury" .)