Chap obtained round, small, even fruit (10)

I believe the answer is:

mangosteen

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'fruit' is the definition.
(mangosteen is a kind of fruit)

'chap obtained round small even' is the wordplay.
'chap' becomes 'Man' (I've seen this before).
'obtained round small' becomes 'gost' (I can't explain this - if you can you should give a lot more credence to this answer).
'even' becomes 'e'en' (synonyms).
'man'+'gost'+'een'='MANGOSTEEN'

Can you help me to learn more?

(Another definition for mangosteen that I've seen is " Tropical fruit".)

I've seen this clue in the Sydney Morning Herald.

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