A hero, but in this case a drawback (8)
I believe the answer is:
hereward
'a hero' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
'in this case a drawback' is the wordplay.
'in this case' becomes 'here' (I've seen this in another clue).
'a drawback' becomes 'ward' (I've seen this in other clues).
'here'+'ward'='HEREWARD'
'but' is the link.
Can you help me to learn more?
(Other definitions for hereward that I've seen before include "Wake" , "Anglo-Saxon leader" , "Anglo-Saxon rebel" , "king produced" .)