Engulfed by flames, amphibian remains (9)
I believe the answer is:
leftovers
'remains' is the definition.
(thesaurus)
'engulfed by flames amphibian' is the wordplay.
'engulfed by' is an insertion indicator (I've seen this in other clues).
'flames' becomes 'lovers' (I've seen this in other clues).
'amphibian' becomes 'eft' (eft is a kind of amphibian).
'lovers' enclosing 'eft' is 'LEFTOVERS'.
(Other definitions for leftovers that I've seen before include "survivors" , "Remains" , "Uneaten scraps" .)