Decide to stop holding concessions back (7)
I believe the answer is:
dispose
'decide' is the definition.
(thesaurus)
'stop holding concessions back' is the wordplay.
'stop' becomes 'die' (I've seen this in other clues**).
'holding' indicates putting letters inside.
'concessions' becomes 'sops' (sop is a kind of concession).
'back' says the letters should be written backwards.
'sops' in reverse letter order is 'spos'.
'die' going around 'spos' is 'DISPOSE'.
'to' is the link.
(Other definitions for dispose that I've seen before include "Place in order; bestow" , "Arrange - to get rid (of)" , "Incline" , "Place in order (as God does)" , "make an arrangement" .)