Flame adjustment to reheat stew (10)
I believe the answer is:
sweetheart
'flame' is the definition.
(thesaurus)
'adjustment to reheat stew' is the wordplay.
'adjustment to' indicates an anagram.
'reheat'+'stew'='reheatstew'
'reheatstew' with letters rearranged gives 'SWEETHEART'.
(Other definitions for sweetheart that I've seen before include "boyfriend?" , "Dear" , "flame?" , "Steady!" , "One loved" .)