Good man taking the air, seen between flights (5)
I believe the answer is:
stair
'seen between flights' is the definition.
I can't judge whether this defines the answer.
'good man taking the air' is the wordplay.
'good man' becomes 'st' (abbreviation for saint).
'taking' is a charade indicator (letters next to each other).
'st'+'air'='STAIR'
Can you help me to learn more?
(Other definitions for stair that I've seen before include "Rising step" , "one on the way up" , "Component of flight" , "Step in house" , "Flight unit" .)