Suit the deed (6)
I believe the answer is:
action
This clue is a double definition.
'suit' is the first definition.
(synonyms)
'the deed' is the second definition.
(I've seen this before)
(Other definitions for action that I've seen before include "It is said to speak louder than words" , "''. . . . . . speaks louder than words'' (6)" , "Lawsuit; thing done" , "SECOND PART OF 15" , "A judicial proceeding brought by one party against another" .)