Good to become interested again in fruit (9)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
greengage
'good' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'interested again in fruit' is the wordplay.
'interested' becomes 'gen' (I can't explain this - if you can you should give a lot more credence to this answer).
'again' becomes 're' (prefix meaning 'again').
'in' means one lot of letters goes inside another.
'fruit' becomes 'gage' (a greengage or gage is a type of fruit).
'gen' placed around 're' is 'green'.
'green'+'gage'='GREENGAGE'
'to become' acts as a link.
Can you help me to learn more?
(Other definitions for greengage that I've seen before include "Fruit tree" , "Such a summer novel" , "Garden fruit" , "Plum-like fruit" , "Fruit akin to plum" .)