Perhaps William Spooner’s cultivated reputation (5,4)

I believe the answer is:

first name

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'perhaps william spooner's' is the definition.
I can't tell whether this defines the answer.

'cultivated reputation' is the wordplay.
'cultivated' becomes 'first' (I can't explain this - if you can you should believe this answer much more).
'reputation' becomes 'name' (someone's good name is their reputation).
'first'+'name'='FIRST NAME'

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I've seen this clue in The Times.

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