Giving in official letter after payment made (10)
I believe the answer is:
submissive
'giving' is the definition.
(thesaurus)
'official letter after payment made' is the wordplay.
'official letter' becomes 'missive' (I've seen this in another clue).
'after' means one lot of letters go next to another.
'payment made' becomes 'sub' (subscription fees).
'missive' after 'sub' is 'SUBMISSIVE'.
'in' is the link.
(Other definitions for submissive that I've seen before include "Meekly obedient" , "tendering resignation?" .)