Fix up couple again (6)
I believe the answer is:
repair
I believe this is a double definition.
'fix up' is the first definition.
(thesaurus)
'couple again' is the second definition.
('pair' can be a synonym for 'couple' so perhaps 'repair' is OK for 'couple again')
(Other definitions for repair that I've seen before include "resort" , "It may be effected by" , "Proceed - restore" , "service" , "Mend, put right" .)