Crossword Genius

Not really the person to take a hand (5)

Ross

I believe the answer is:

dummy

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'hand' is the definition.
(I have seen 'exposed hand' mean 'dummy' so perhaps 'hand' could also mean 'dummy')

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for dummy that I've seen before include "Feign to pass" , "Model of a human being" , "Pacifier" , "who lays his cards on the table?" , "Clothes shop model" .)

I've seen this clue in the Evening Standard.
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