Harry not cutting flying (2,3,4)
I believe the answer is:
on the wing
'flying' is the definition.
(I've seen this before)
'harry not cutting' is the wordplay.
'harry' is an anagram indicator (harry can mean to attack or spoil).
'cutting' becomes 'hewing'.
'not' is an anagram of 'ont'.
'ont'+'hewing'='ON THE WING'
(Other definitions for on the wing that I've seen before include "Where one used to see 7 or 11" , "Where feathers are" , "down the touchline" , "in the air" , "in flight?" .)