Decline to make us free (6)
I believe the answer is:
refuse
'decline' is the definition.
(synonyms)
'make us free' is the wordplay.
'make' indicates an anagram.
'us'+'free'='usfree'
'usfree' is an anagram of 'REFUSE'.
'to' is the link.
(Other definitions for refuse that I've seen before include "Turn away" , "Waste, garbage" , "'Deny, turn down (6)'" , "Decline to accept - rubbish" , "Trash" .)