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 another clue)

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

Can you help me to learn more?

(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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