Not a well cooked portion of savoury dish (7)
I believe the answer is:
rarebit
'savoury dish' is the definition.
(I've seen this before)
'not a well cooked portion' is the wordplay.
I cannot quite see how this works, but
'a' is within the answer.
'portion' could be 're' (re is a kind of portion) and 're' is found within the answer.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for rarebit that I've seen before include "Simple dish" , "See 8 Across" , "Toasted cheese and bread" , "Melted cheese on hot toast" , "Welsh snack" .)