Gloomy, morose (4)
I believe the answer is:
dour
I believe this clue is a double definition.
'gloomy' is the first definition.
(I've seen this in other clues)
'morose' is the second definition.
(I know that morose can be written as dour)
(Other definitions for dour that I've seen before include "Grim, morose" , "Stern, humourless" , "Dreary" , "Gloomy in manner or appearance" , "Stern and severe looking" .)