Spread a brunette put out (6,6)
I believe the answer is:
peanut butter
'spread' is the definition.
(peanut butter is a kind of spread)
'a brunette put out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'a'+'brunette'+'put'='abrunetteput'
'abrunetteput' with letters rearranged gives 'PEANUT BUTTER'.
(Other definitions for peanut butter that I've seen before include "Golden brown paste" , "something to eat" , "Spread made from groundnuts" , "Leguminous spread" .)