Crossword Genius

Nissan driver's not completely smooth (4)

Ross

I believe the answer is:

sand

'smooth' is the definition.
(I know that sand is a kind of smooth)

'nissan driver's not completely' is the wordplay.
'not completely' indicates a hidden word.
'SAND' is hidden in the letters of 'nissan drivers'.

(Other definitions for sand that I've seen before include "Grit; powdered rock" , "George - - (French authoress)" , "Hourglass particles" , "Granulated quartz" , "Beach susbstance" .)

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