The food you have in your mouth (6)
I believe the answer is:
tongue
'mouth' is the definition.
(thesaurus)
'the food you have in your' is the wordplay.
I cannot quite see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
'food' could be 'e' (E is an example) and 'e' is present in the answer.
'you' could be 'u' (homophones) and 'u' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for tongue that I've seen before include "One gut in the mouth" , "Style of speaking; lick" , "dialect" , "rudely, one could be put out" , "spit" .)