Regarding couple, make good (6)
I believe the answer is:
repair
'make good' is the definition.
(thesaurus)
'regarding couple' is the wordplay.
'regarding' becomes 're'.
'couple' becomes 'pair' ('pair' can be a synonym of 'couple').
're'+'pair'='REPAIR'
(Other definitions for repair that I've seen before include "Proceed - restore" , "Restore to working condition" , "Make one's way (to); fix" , "retire" , "It may be effected by" .)