Couples finding Paris confusing (5)
I believe the answer is:
pairs
'couples' is the definition.
('pair' can be a synonym of 'couple')
'paris confusing' is the wordplay.
'confusing' indicates an anagram.
'paris' is an anagram of 'PAIRS'.
'finding' acts as a link.
(Other definitions for pairs that I've seen before include "Couples" , "golfing matches" , "Duos" .)