Brown, the flier circling the flight centre (5)
I believe the answer is:
beige
'brown' is the definition.
(I know that beige is a type of brown)
'the flier circling the flight centre' is the wordplay.
'the flier' becomes 'bee' (I can't justify this - if you can you should give a lot more credence to this answer).
'circling' is an insertion indicator (circling can mean going around or containing).
'centre' means to look at the middle letters.
The middle letters of 'flight' are 'ig'.
'bee' placed around 'ig' is 'BEIGE'.
Can you help me to learn more?
(Other definitions for beige that I've seen before include "Pale brown" , "Light brown" , "Shade of brown" , "Taupe" , "Pale sandy fawn colour" .)