Couples touring Paris (5)
I believe the answer is:
pairs
'couples' is the definition.
('pair' can be a synonym of 'couple')
'touring paris' is the wordplay.
'touring' indicates an anagram (touring can mean moving around).
'paris' anagrammed gives 'PAIRS'.
(Other definitions for pairs that I've seen before include "golfing matches" , "Duos" , "Couples" .)