On paper, it's useful for small removal jobs (6)

I believe the answer is:

eraser

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'on paper' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for eraser that I've seen before include "correction device" , "Rubber, thing that wipes out" , "Obliterator" , "Rubber for removing marks" , "destroyer" .)

I've seen this clue in the Evening Standard.

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