Plumber's friend? (7)

I believe the answer is:

plunger

'plumber's friend?' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for plunger that I've seen before include "Drain unblocker" , "Sink unblocker" , "Rubber pipe unblocker" , "Better" , "Plumber's friend" .)

I've seen this clue in The Guardian.

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