Crossword Genius

One washing up has no time for getting clean (5)

Ross

I believe the answer is:

rehab

'getting clean' is the definition.
(eg getting clean from drugs)

I don't understand the rest of the clue.

(Other definitions for rehab that I've seen before include "A herb (anag.)" , "Treatment for, eg, addiction" , "Health-restoring process" , "Restorative care" , "Course of treatment for addicts" .)

I've seen this clue in The Guardian.
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