He’s short, you know (3)

I believe the answer is:

ken

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'know' is the definition.
(I've seen this in other clues)

'he's short you' is the wordplay.
'he' becomes 'kev' (short for Kevin).
'short' means to remove the last letter.
'you' becomes 'n' (I am not sure about this - if you are sure you should believe this answer much more).
'kev' with its final letter removed is 'ke'.
'ke'+'n'='KEN'

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(Other definitions for ken that I've seen before include "Understanding - boy's name" , "Know; man's name" , "Identify; -- Livingstone" , "Notice" , "Awareness" .)

I've seen this clue in the Evening Standard.

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