Crossword Genius

Old enough, for instance (7)

Ross

I believe the answer is:

example

'instance' is the definition.
(synonyms)

'old enough' is the wordplay.
'old' becomes 'ex' (prefix meaning former or onetime).
'enough' becomes 'ample' (ample means enough or plenty).
'ex'+'ample'='EXAMPLE'

'for' is the link.

(Other definitions for example that I've seen before include "Model - instance" , "lesson" , "Prototype" , "Specimen, illustration" , "Specimen, sample" .)

I've seen this clue in The Times and The Sunday Times.
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