I'm a success, producing form of insect life (5)
I believe the answer is:
imago
'form of insect life' is the definition.
'imago' can be an answer for 'form' (I have seen 'Form of insect' mean 'imago' so perhaps 'form' could also mean 'imago'). I am not certain of the 'of insect life' bit.
'i'm a success' is the wordplay.
'success' becomes 'go' (I've seen this in other clues).
'im'+'a'+'go'='IMAGO'
'producing' acts as a link.
Can you help me to learn more?
(Other definitions for imago that I've seen before include "Mature insect after metamorphosis" , "in the developmental stage" , "That's as far as a butterfly can go" , "Sexually mature adult insect" , "latest development in cricket?" .)