"Let's shake on it!” (4)

I think it could be either:

Which length description are you looking for?:

deal

'let's shake on it' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for deal that I've seen before include "Bargain, contract" , "What business folk do" , "understanding" , "Pass around (e.g. cards)" , "Kent town" .)

I've seen this clue in the Universal, the Newsday and The Wall Street Journal.

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