Fly through during tea break (6)
I believe the answer is:
aviate
'fly' is the definition.
('aviate' can be a synonym of 'fly')
'through during tea break' is the wordplay.
'through' becomes 'via' (I've seen this before**).
'during' is an insertion indicator.
'break' indicates an anagram.
'tea' is an anagram of 'ate'.
'via' going inside 'ate' is 'AVIATE'.
(Other definitions for aviate that I've seen before include "Fly" , "Ride the Zephyr, say" , "Handle jumbo, maybe" , "Pilot a plane" .)