Can Chinese mate get signature? (4,7)

I believe the answer is:

john hancock

'signature?' is the definition.
(I know that John Hancock is a type of signature)

'can chinese mate' is the wordplay.
'can' becomes 'john' (slang for toilet).
'chinese' becomes 'han' (Chinese dynasty).
'mate' becomes 'cock' (both are terms of affection).
'john'+'han'+'cock'='JOHN HANCOCK'

'get' acts as a link.

(Another definition for john hancock that I've seen is " Signature of American".)

I've seen this clue in The Independent.

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