Crossword Genius

Descriptive of the rasher drivers? (4,4)

Ross

I believe the answer is:

road hogs

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'drivers?' is the definition.
(road hog is a kind of driver)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Another definition for road hogs that I've seen is " Impatient and intemperate drivers".)

I've seen this clue in The Globe and Mail.
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