Bringing back rice (about a pound) and a cake (6)
I believe the answer is:
eclair
'cake' is the definition.
(eclair is a type of cake)
'bringing back rice about a pound and a' is the wordplay.
'bringing back' says the letters should be written backwards.
'about' indicates putting letters inside.
'a pound' becomes 'L' (the pound sign is based on an L).
'and' says to put letters next to each other.
'l' after 'a' is 'al'.
'rice' going around 'al' is 'rialce'.
'rialce' written backwards gives 'ECLAIR'.
(Other definitions for eclair that I've seen before include "Food" , "Dainty" , "Long chocolate cake for Claire" , "Cake, "long in shape but short in duration"" , "Finger-shaped cream-filled cake of choux pastry" .)