Selection of food — continuous talk about pounds (7)
I believe the answer is:
platter
'selection of food' is the definition.
(food served on a platter)
'continuous talk about pounds' is the wordplay.
'continuous talk' becomes 'patter' (patter can mean rapid talk).
'about' indicates putting letters inside.
'pounds' becomes 'L' (abbreviation e.g. Lsd - pounds, shillings, pence).
'patter' going around 'l' is 'PLATTER'.
(Other definitions for platter that I've seen before include "main course" , "Large flat plate" , "Charger" , "Shallow serving dish" , "old record?" .)