Black and blue (3)
I believe this clue is a double definition.
'black' is the first definition.
(I've seen this in another clue)
'blue' is the second definition.
(similar in meaning)
'and' acts as a link.
(Other definitions for dirty that I've seen before include "1971 film with Clint Eastwood" , "Muddy" , "Mucky" , "producing a lot of fallout" , "Lewd" .)
This might be a double definition.
'black' is the first definition.
Both the definition and answer are adjectives. Perhaps there's an association between them I don't understand?
'blue' is the second definition.
(I know that blue can be written as sad)
'and' is the link.
Can you help me to learn more?
(Other definitions for sad that I've seen before include "Doleful" , "Dismal" , "Winter blues, initially" , "Tragic" , "upset" .)