Sit angrily, reviewing complaint (10)
I believe the answer is:
laryngitis
'complaint' is the definition.
(laryngitis is a kind of disease)
'sit angrily reviewing' is the wordplay.
'reviewing' indicates anagramming the letters (To re view).
'sit'+'angrily'='sitangrily'
'sitangrily' anagrammed gives 'LARYNGITIS'.
(Other definitions for laryngitis that I've seen before include "Inflammation of the vocal cords" , "Inflammation of the windpipe" , "Inflammation making it difficult to speak" , "Throat infection" , "Sore throat" .)