Shooting clique gathered around unfinished keg (5)
I believe the answer is:
skeet
'shooting' is the definition.
(US shooting sport)
'clique gathered around unfinished keg' is the wordplay.
'clique' becomes 'set' (I've seen this in another clue).
'gathered around' indicates putting letters inside.
'unfinished' means to remove the last letter.
'keg' with its final letter taken away is 'ke'.
'set' enclosing 'ke' is 'SKEET'.
(Other definitions for skeet that I've seen before include "American clay pigeon shooting" , "A form of clay-pigeon shooting" , "US version of a shooting sport involving clay pigeons" , "Form of clay pigeon shooting" .)