Gloomy and angry about the doc (6)
I believe the answer is:
sombre
'gloomy' is the definition.
(I've seen this before)
'angry about the doc' is the wordplay.
'angry' becomes 'sore' ('sore' can be similar in meaning to 'angry').
'about' indicates putting letters inside.
'the doc' becomes 'mb' (I can't explain this - if you can you should give a lot more credence to this answer).
'sore' going around 'mb' is 'SOMBRE'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for sombre that I've seen before include "Dim or dismal" , "Grave or gloomy" , "Dark and gloomy of manner" , "Dark, dull" , "Melancholic" .)