Unsmiling (6)
'unsmiling' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dour that I've seen before include "Sullen, severe" , "Dreary" , "Lugubrious, grim" , "Erratic" , "Severe, gloomy-looking" .)
'unsmiling' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for solemn that I've seen before include "Serious and humourless" , "Portentous" , "'Dignified, sombre (6)'" , "'Earnest, grave (6)'" , "Formal, ceremonius" .)