Fix everything after this month (7)
I believe the answer is:
install
'fix' is the definition.
(thesaurus)
'everything after this month' is the wordplay.
'everything' becomes 'all' (I've seen this before).
'after' is a charade indicator (letters next to each other).
'this month' becomes 'inst' (I've seen this before).
'all' after 'inst' is 'INSTALL'.
(Other definitions for install that I've seen before include "Set up, ready for use" , "Load up" , "Settle" , "Lodge" , "Place (something) in its working position" .)