It's clear that an insect has burrowed into this fruit (8)
I believe the answer is:
plantain
'this fruit' is the definition.
(I've seen this before)
'it's clear that an insect has burrowed' is the wordplay.
I cannot really understand how this works, but
'an' could be 'i' (Roman numeral for one) and 'i' is present in the answer.
'insect' could be 'ant' (ant is a kind of insect) and 'ant' is located in the answer.
The remaining letters 'plan' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'into' acts as a link.
Can you help me to learn more?
(Other definitions for plantain that I've seen before include "Large banana - weed" , "Low-growing plant; type of banana" , "Tropical plant like a banana" , "Tropical food" , "Banana-like fruit" .)