Doctor rages after Freedom of Information exposes controversial food (4,4)
I believe the answer is:
'food' is the definition.
(I've seen this before)
'doctor rages after freedom of information' is the wordplay.
'doctor' is an anagram indicator.
'after' means one lot of letters go next to another.
'freedom of information' becomes 'foi' (this might be a standard abbreviation of which I'm unaware).
'rages' anagrammed gives 'egras'.
'egras' after 'foi' is 'FOIE GRAS'.
'exposes controversial' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for foie gras that I've seen before include "French delicacy" , "Type of pate" , "Edward ---, discovered vaccination" , "Rich pate" , "Pate made from goose liver with truffles" .)