More than is proper, couple made out (3)
I believe the answer is:
too
'more' is the definition.
(thesaurus)
'couple made out' is the wordplay.
'couple' becomes 'two' (two people or things).
'made out' shows a homophone (sound like) (to make something out is to hear it).
'two' is a homophone of 'TOO'.
'than is proper' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for too that I've seen before include "Additionally" , "As well; in addition" , "What a pity!" , "As well, also" , "Furthermore" .)