Pot roasts lacks a port to mix around, in the culinary sense (4)
I believe the answer is:
toss
'the culinary sense' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'pot roasts lacks a port to mix around' is the wordplay.
I cannot quite see how this works, but
'to' is within the answer.
This may be the basis of clue (or it may be nonsense).
'in' acts as a link.
Can you help me to learn more?
(Other definitions for toss that I've seen before include "Fling" , "Pitch" , "Throw into the air" , "Raise a bit of money before opening" , "Throw with a light motion" .)