Love a duck eating last of cream and porridge (7)
I believe the answer is:
oatmeal
'porridge' is the definition.
('oatmeal' can be a synonym of 'porridge')
'love a duck eating last of cream' is the wordplay.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'duck' becomes 'teal' (teal is a kind of duck**).
'eating' means one lot of letters goes inside another.
'last of' suggests the final letters.
The last letter of 'cream' is 'm'.
'teal' going around 'm' is 'tmeal'.
'o'+'a'+'tmeal'='OATMEAL'
'and' acts as a link.
(Other definitions for oatmeal that I've seen before include "ground food!" , "The material for porridge" , "Greyish-fawn colour flecked with brown" , "Pale variegated brown colour" , "Plain food" .)