Fruit of some long endeavours (5)

I believe the answer is:

melon

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

'of some long endeavours' is the wordplay.
'of' says the answer is hidden in the clue.
'MELON' is hidden within 'some long endeavours'.

(Other definitions for melon that I've seen before include "Sweet juicy gourd" , "Honeydew fruit" , "Type of fruit" , "Sweet juicy fruit" , "Large vine fruit" .)

I've seen this clue in the Evening Standard.

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