Regular red revolution in French airport (7)
I believe the answer is:
orderly
'regular' is the definition.
(similar in meaning)
'red revolution in french airport' is the wordplay.
'revolution' is an anagram indicator.
'in' is an insertion indicator.
'french airport' becomes 'orly' (I've seen this before).
'red' anagrammed gives 'der'.
'der' placed inside 'orly' is 'ORDERLY'.
(Other definitions for orderly that I've seen before include "Hospital attendant; well behaved" , "Neat, tidy; soldier" , "Methodical, like soldier servant" , "Soldier with special duties - hospital attendant" , "Regular - soldier" .)