Strip where waste left rotting (4,3)

I believe the answer is:

peel off

'strip' is the definition.
(to peel something off is to strip it)

'waste left rotting' is the wordplay.
'waste' becomes 'pee' (informal term for urine).
'left' becomes 'L' (common abbreviation).
'rotting' becomes 'off' (something going off is rotting).
'pee'+'l'+'off'='PEEL OFF'

'where' is the link.

(Another definition for peel off that I've seen is " Strip".)

I've seen this clue in The Guardian.

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