Fruit of some long endeavours (5)

I believe the answer is:

melon

'fruit' is the definition.
(type of fruit)

'of some long endeavours' is the wordplay.
'of' indicates the answer is hidden within 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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