Leave by plane with the worker before the French become very angry (3,3,3,6)
I believe the answer is:
fly off the handle
'become very angry' is the definition.
'leave by plane with the worker before the french' is the wordplay.
I cannot really understand how this works, but
'leave' could be 'fly' (flying is a kind of leaving) and 'fly' is found within the answer.
'by' could be 'of' and 'of' is found in the answer.
'with' could be 'and' and 'and' is found within the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
'french' could be 'f' (abbreviation) and 'f' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for fly off the handle that I've seen before include "react angrily" , "Lose one's temper" , "See red" , "Robin perching on spade may" .)