Palmistry manual? (8)

I believe the answer is:

handbook

I'm a little stuck... Click here to teach me more about this clue!

'palmistry manual?' is the definition.
'handbook' can be an answer for 'manual?' (instruction manual). I am not sure about the 'palmistry' bit.

'palmistry manual?' is the wordplay.
'palmistry' becomes 'hand' (I can't justify this - if you can you should give a lot more credence to this answer).
'manual?' becomes 'book' (manual is a kind of book).
'hand'+'book'='HANDBOOK'

Can you help me to learn more?

(Other definitions for handbook that I've seen before include "Manual, reference" , "Guide" , "companion" .)

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

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