Being on duty, stop light reflecting through airport (7)
I believe the answer is:
orderly
'being on duty' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'stop light reflecting through airport' is the wordplay.
'stop light' becomes 'red' (I've seen this in another clue).
'reflecting' says the letters should be written backwards.
'through' indicates putting letters inside (inserted letters go through the word).
'airport' becomes 'orly' (French airport).
'red' backwards is 'der'.
'der' put into 'orly' is 'ORDERLY'.
Can you help me to learn more?
(Other definitions for orderly that I've seen before include "Methodical, like soldier servant" , "Methodical; hospital worker" , "Well-behaved -- soldier attending to a superior officer" , "in a mess? No" , "Regular - neat" .)