Dignified, sombre (6)
I believe the answer is:
solemn
This clue is a double definition.
'dignified' is the first definition.
(I've seen this before)
'sombre' is the second definition.
(synonyms)
(Other definitions for solemn that I've seen before include "'Earnest, grave (6)'" , "Formal, ceremonial" , "'Dignified, sombre (6)'" , "gloomy" , "Serious, dignified or ceremonial" .)