Chicken, say, is one thing to dunk in cereal (5,4)
I believe the answer is:
white meat
'chicken say' is the definition.
(I know that chicken meat is a type of poultry)
'one thing to dunk in cereal' is the wordplay.
I cannot really see how this works, but
'one' could be 'item' (I've seen this before) and 'item' is found in the answer.
'cereal' could be 'wheat' (wheat is a kind of cereal) and 'wheat' is found in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
'is' is the link.
Can you help me to learn more?
(Other definitions for white meat that I've seen before include "light meal?" , "chicken, say" , "Turkey breast, perhaps" , "chicken perhaps" .)