Such luck makes things difficult for golfers (5)

I believe the answer is:

rough

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'such' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?

I don't understand the remainder of the clue.

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(Other definitions for rough that I've seen before include "Violent type" , "Approximate - rudimentary" , "Rasping" , "Nasty" , "Approximate; turbulent" .)

I've seen this clue in the Evening Standard.

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