Insect hovering around door maybe causing rage (3,3,3,6)
I believe the answer is:
fly off the handle
'rage' is the definition.
(thesaurus)
'insect hovering around door maybe' is the wordplay.
I cannot really see how this works, but
'insect' could be 'fly' (fly is a kind of insect) and 'fly' is present in the answer.
'around' could be 'o' (I've seen this in other clues) and 'o' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'causing' acts as a link.
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" , "Robin perching on spade may" , "See red" .)