Movements? Nods or shakes (6)

I believe the answer is:

rondos

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'movements?' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

'nods or shakes' is the wordplay.
'shakes' indicates an anagram.
'nods'+'or'='nodsor'
'nodsor' with letters rearranged gives 'RONDOS'.

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