Crossword Genius

Signed agreement? (3)

Ross

I believe the answer is:

nod

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'agreement?' is the definition.
(a nod indicates agreement)

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(Other definitions for nod that I've seen before include "Assenting head gesture" , "Agree non-verbally" , "Careless mistake" , "Show recognition" , "It's said to be as good as a wink" .)

I've seen this clue in the Sydney Morning Herald.
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