Bug in can beginning to eat fruit (9)
I believe the answer is:
tangerine
'fruit' is the definition.
(tangerine is a kind of fruit)
'bug in can beginning to eat' is the wordplay.
'bug' becomes 'anger' (both can mean to annoy).
'in' is an insertion indicator.
'can' becomes 'tin' (both are metal containers).
'beginning to eat' becomes 'e' (I can't justify this - if you can you should give a lot more credence to this answer).
'anger' going within 'tin' is 'tangerin'.
'tangerin'+'e'='TANGERINE'
Can you help me to learn more?
(Other definitions for tangerine that I've seen before include "Moroccan" , "orange colour" , "fruit product" , "something juicy being given to press" , "shade" .)