Couples travelling Paris (5)
I believe the answer is:
pairs
'couples' is the definition.
('pair' can be a synonym of 'couple')
'travelling paris' is the wordplay.
'travelling' indicates anagramming the letters.
'paris' with letters rearranged gives 'PAIRS'.
(Other definitions for pairs that I've seen before include "Duos" , "golfing matches" , "Couples" .)