Not many will cross line winged (4)

I believe the answer is:

flew

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'winged' is the definition.
('fly' can be a synonym of 'wing')

'not many will cross line' is the wordplay.
'not many will' becomes 'few' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'cross' is an insertion indicator.
'line' becomes 'l'.
'few' going around 'l' is 'FLEW'.

Can you help me to learn more?

(Other definitions for flew that I've seen before include "Rushed (by air?)" , "Fled" , "was airborne" , "bolted" , "Took off" .)

I've seen this clue in The Telegraph.

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