Tolerate a burn

I believe the answer is:

brook

This clue is a double definition.

'tolerate' is the first definition.
(I know this)

'a burn' is the second definition.
(I know this)

(Other definitions for brook that I've seen before include "running water" , "Stand for" , "stomach" , "Bear - small stream" , "Stream; put up with" .)

I've seen this clue in the Evening Standard.

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