Crossword Genius

Decoration added to a drinking place (3)

Ross

I believe the answer is:

bar

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'drinking place' is the definition.

I cannot understand how the rest of the clue works.

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(Other definitions for bar that I've seen before include "Prevent; pub" , "Lawyers may be called to it" , "Impediment" , "Obstruct" , "some chocolate" .)

I've seen this clue in the Evening Standard.
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