Man of imagination (3)

I believe the answer is:

nat

'man' is the definition.

'of imagination' is the wordplay.
'of' says the answer is hidden in the clue.
'NAT' is hidden within 'imagination'.

(Other definitions for nat that I've seen before include "King Cole" , "Politician" , "Supporter of the SNP (abbr)" , "A nationalist" .)

I've seen this clue in the Evening Standard.

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