In dire disappointment, visibly angry (3)
I believe the answer is:
red
'visibly angry' is the definition.
(red in the face)
'in dire disappointment' is the wordplay.
'in' indicates a hidden word.
'RED' is hidden in the letters of 'dire disappointment'.
(Other definitions for red that I've seen before include "Primary colour" , "Colour of communism" , "Colour for a blusher" , "Carmine" , "Scarlet or vermilion" .)