A bit tired and angry (3)
I believe the answer is:
red
'angry' is the definition.
(someone may go red when angry)
'a bit tired and' is the wordplay.
'a bit' indicates a hidden word (I've seen 'bit of' mean this).
'RED' can be found hidden inside 'tired and'.
(Other definitions for red that I've seen before include "The colour of the former Russian army" , "Type of wine" , "Colour of a cardinal's hat" , "Crimson" , "Colour of communism" .)