Couples finding Paris confusing (5)
I believe the answer is:
Here is my best explanation:
'couples' is the definition.
('pair' can be a synonym of 'couple')
'paris confusing' is the subsidiary indication.
'confusing' is an anagram indicator.
'paris' is an anagram of 'pairs'.
'finding' is the link.
(Other definitions for pairs that I've seen before include "Couples", "golfing matches" and "Duos".)