Crossword Genius

Insulate (3)

Ross

I believe the answer is:

lag

'insulate' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for lag that I've seen before include "Fall behind on march" , "Prisoner" , "Wrap water-pipes; fall behine" , "Convict (slang)" , "Cover pipes" .)

I've seen this clue in The Independent, the Evening Standard and The Mirror.
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