Irregular; not smooth (5)

I believe the answer is:

rough

This clue is a double definition.

'irregular' is the first definition.
(associated in meaning)

'not smooth' is the second definition.
(I know this)

(Other definitions for rough that I've seen before include "Uneven, harsh" , "Rasping" , "Approximate; hooligan" , "Approximate; turbulent" , "Drivers try to steer clear of this" .)

I've seen this clue in the Sydney Morning Herald.

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