Cook cheesed off with poem about recipe that's right (7,2,6)

'right' is the definition.
(freedom of speech is a kind of right)

'cook cheesed off with poem about recipe' is the wordplay.
I cannot really see how this works, but
'cook' could be 'do' (do can mean to cook) and 'do' is found within the answer.
'about' could be 're' ('re' means regarding or about) and 're' is found within the answer.
This may be the basis of clue (or it may be nonsense).

'that's' is the link.

Can you help me to learn more?