Discloses again the meat for cooking (7)
I believe the answer is:
reveals
'discloses' is the definition.
('reveal' can be a synonym of 'disclose')
'again the meat for cooking' is the wordplay.
'again' becomes 're' (prefix meaning 'again').
'the meat' becomes 'veal' (veal is a kind of meat).
'for cooking' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
're'+'veal'+'s'='REVEALS'
Can you help me to learn more?
(Other definitions for reveals that I've seen before include "Upright sides of doors and windows" , "Divulges" , "Unmasks" , "Shows" , "Exposes" .)