Genuine contract by the sound of it (5)

I believe the answer is:

pukka

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'genuine' is the definition.
(I've seen this in another clue)

I can't explain the remainder of the clue.

(Other definitions for pukka that I've seen before include "Absolutely first class and genuine" , "not mock" , "that's for sure" , "Perfectly made (in India?)" , "Genuine (Anglo-Indian)" .)

I've seen this clue in The Globe and Mail.

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