Crazy individual’s name, say (6)

I believe the answer is:

nutter

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'crazy individual's name say' is the definition.
I can't tell whether this definition defines the answer.

'name say' is the wordplay.
'name' becomes 'n' (common abbreviation e.g. on forms).
'say' becomes 'utter' (to utter something is to say or speak it).
'n'+'utter'='NUTTER'

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(Other definitions for nutter that I've seen before include "Very eccentric type" , "In slang, a crazy or eccentric person" , "fruitcake" , "psychopath" , "Idiot" .)

I've seen this clue in The Times.

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