Ill at ease as gum provides savoury filling (7,4)
I believe the answer is:
sausage meat
'savoury filling' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'ill at ease as gum' is the wordplay.
'ill' is an anagram indicator.
'at'+'ease'+'as'+'gum'='ateaseasgum'
'ateaseasgum' with letters rearranged gives 'SAUSAGE-MEAT'.
'provides' is the link.
Can you help me to learn more?
(Other definitions for sausage meat that I've seen before include "Party roll filler" , "Scotch egg ingredient" , "Base for Scotch eggs" , "One of the ingredients of a Scotch egg" , "Pig" .)