Unmannered (4)

I believe the answer is:

rude

'unmannered' is the definition.
(synonyms)

This is the entire clue.

(Other definitions for rude that I've seen before include "Unpleasant" , "likely to offend" , "Impolite, without consideration" , "Impolite; basic" , "Insolent" .)

I've seen this clue in The Mirror.

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