Crossword Genius

Cleaners, underworked, having coffee outside (10)

Ross

I believe the answer is:

laundrette

'cleaners' is the definition.
(establishment where clothes can be cleaned)

I don't understand how the remainder of the clue works.

(Other definitions for laundrette that I've seen before include "Wash-room" , "Washing establishment" , "On film, mine was beautiful" , "cleaning outfit" .)

I've seen this clue in The Guardian.
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