Speaking about food (3)
I believe the answer is:
pea
'food' is the definition.
(I know that pea is a food ingredient)
'speaking about' is the wordplay.
'about' indicates the answer is hidden within the clue (the clue goes around or about the answer).
'PEA' can be found hidden inside 'speaking'.
(Other definitions for pea that I've seen before include "Ape this plant badly" , "It grows in 23 Down" , "Cause of a princess's insomnia?" , "Edible green seed" , "Edible seed from pod" .)