Small part of scooped out bananas covered in fat (6)
I believe the answer is:
subset
'small part of scooped' is the definition.
I can't judge whether this defines the answer.
'bananas covered in fat' is the wordplay.
'bananas' becomes 'bs' (I can't explain this - if you can you should believe this answer much more).
'covered in' is an insertion indicator.
'fat' becomes 'suet' (suet is a kind of fat).
'bs' placed within 'suet' is 'SUBSET'.
'out' acts as a link.
Can you help me to learn more?
(Other definitions for subset that I've seen before include "A collection of things forming part of a larger collection" , "Small group nested inside larger group" , "Group within a group" , "Group of which all the elements are contained in a larger group" , "small class?" .)