Music of the Depression? (5)

I believe the answer is:

blues

I believe this clue is a double definition.

'music' is the first definition.
(blues is a kind of music)

'the depression?' is the second definition.
(blues is a kind of depression)

'of' is the link.

(Other definitions for blues that I've seen before include "Jazz classic (2,5,5) - See 9" , "Feeling of sadness or depression" , "US music style" , "Melancholy music of Black American origin" , "Melancholic music of black American folk origin" .)

I've seen this clue in The Telegraph and The Globe and Mail.

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