See under one kind of fruit for another (6)
I believe the answer is:
pomelo
'fruit for another' is the definition.
I can't judge whether this definition defines the answer.
'see under one kind' is the wordplay.
'see' becomes 'lo' (archaic exclamation meaning 'look!').
'under' is a charade indicator (letters next to each other) (in a down clue, some letters go below others).
'one kind' becomes 'pome' (I can't explain this - if you can you should give a lot more credence to this answer).
'lo' after 'pome' is 'POMELO'.
'of' is the link.
Can you help me to learn more?
(Other definitions for pomelo that I've seen before include "Largest citrus fruit" , "Shaddock" .)