Sadness at Chelsea (5)
I believe the answer is:
blues
This clue might be a double definition.
'sadness' is the first definition.
(I've seen this before)
'chelsea?' is the second definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?
'at' acts as a link.
Can you help me to learn more?
(Other definitions for blues that I've seen before include "Type of American folksong" , "Oxbridge athletes" , "Depression - music" , "Gloom" , "Feeling of sadness or depression" .)