Preserve guts (6)

I believe the answer is:

bottle

This clue is a double definition.

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

'guts' is the second definition.
(thesaurus)

(Other definitions for bottle that I've seen before include "Glass container or slangy courage" , "Narrow-necked vessel" , "The spirit" , "Glass container - firmness of resolve" , "Heart" .)

I've seen this clue in The Telegraph.

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