Crossword Genius

Rubber boot wearers out west (6)

Ross

I believe the answer is:

eraser

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'rubber' is the definition.
(rubber can mean an eraser)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for eraser that I've seen before include "A student's rubber, or the one who uses it" , "device for deleting things" , "It could remove" , "Required, should you make a mistake" , "Rubs out" .)

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