Crossword Genius

Hooligan on the golf course? (5)

Ross

I believe the answer is:

rough

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'hooligan' is the definition.
(rough can mean a hooligan or violent person)

I don't understand the rest of the clue.

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(Other definitions for rough that I've seen before include "Uneven, harsh" , "Hard - coarse - inexact" , "that driver tries to avoid" , "Jagged" , "grating > below par" .)

I've seen this clue in the Evening Standard.
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