Determined clique (3)
I believe the answer is:
set
This clue is a double definition.
'determined' is the first definition.
(I know that determined can be written as set)
'clique' is the second definition.
(I've seen this before)
(Other definitions for set that I've seen before include "Cake < , plonk < , something served" , "Mount (precious stone)" , "Firm, like jelly" , "Scenery etc. for the stage" , "Gel; start (a fire)" .)