Crossword Genius

Plumber's challenge (4)

Ross

I believe the answer is:

clog

'plumber's challenge' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for clog that I've seen before include "Congest" , "Block up - type of shoe" , "Obstruct the wooden shoe" , "Footwear - hamper" , "Jam" .)

I've seen this clue in the LA Times.
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