Rubber taint from tea strainer? (6)

I believe the answer is:

eraser

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'rubber' is the definition.
(thesaurus)

I cannot understand how the remainder of the clue works.

(Other definitions for eraser that I've seen before include "Correcting implement used in drawing or writing" , "Rubbing-out device" , "One who removed" , "India rubber" , "Stationery item" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.

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