Seafood glut - one’s heading for aitchbone for change? (9)
I believe the answer is:
langouste
'seafood' is the definition.
(langouste is a kind of seafood)
'glut one's heading for aitchbone for change?' is the wordplay.
'heading for' says to take the initial letters.
'for change?' is an anagram indicator (I've seen 'for change' mean this (I've seen this in other clues)).
The initial letter of 'aitchbone' is 'a'.
'glut'+'ones'+'a'='glutonesa'
'glutonesa' is an anagram of 'LANGOUSTE'.
(Other definitions for langouste that I've seen before include "something to eat" , "Sea creature" , "It may be eaten roasted" , "Swimmer" , "One in the sea" .)