Why the weather man's looking so unhappy? (10)
I believe the answer is:
depression
'why' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'weather man's looking so unhappy?' is the wordplay.
I cannot really see how this works, but
'man' could be 'si' and 'si' is located in the answer.
'so' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'the' is the link.
Can you help me to learn more?
(Other definitions for depression that I've seen before include "Nineteen twenty nine financial slump" , "Blues" , "Bad times" , "gloom" , "Pit" .)