Alfred’s cooking suddenly burned (6)
I believe the answer is:
flared
'suddenly burned' is the definition.
(flare can mean to burn up suddenly)
'alfred's cooking' is the wordplay.
'cooking' is an anagram indicator (cook can mean to falsify or distort).
'alfred' anagrammed gives 'FLARED'.
(Other definitions for flared that I've seen before include "Blazed up - widening out" , "Became suddenly bright or wide" , "(Of nostrils) dilated" , "Blazed with sudden flame - like temper" .)