The problem of depression? (12)
I believe the answer is:
unemployment
This clue could be a double definition.
'the problem' is the first definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'depression?' is the second definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'of' acts as a link.
Can you help me to learn more?
(Another definition for unemployment that I've seen is " State of being out of work".)