Depressing day when area is behind (6)
I believe the answer is:
dreary
'depressing' is the definition.
(I've seen this in another clue)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for dreary that I've seen before include "Bleak, depressing" , "Banal" , "Drab and depressing" , "avoiding exciting stuff" , "routine" .)