Crossword Genius

Allegedly, Trump's vulgar (5)

Ross

I believe the answer is:

rough

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'vulgar' is the definition.
(thesaurus)

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(Other definitions for rough that I've seen before include "scratchy" , "Hard - coarse - inexact" , "The long grass on the golf course" , "Unpolished" , "general" .)

I've seen this clue in The Guardian.
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