Blues so bad, mishandling this? (6,4)

I believe the answer is:

double bass

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'this?' is the definition.
The definition suggests a singular noun which matches the answer.

'blues so bad mishandling' is the wordplay.
'mishandling' is an anagram indicator (I've seen 'mishandled' mean this).
'blues'+'so'+'bad'='bluessobad'
'bluessobad' is an anagram of 'DOUBLE-BASS'.

Can you help me to learn more?

(Other definitions for double bass that I've seen before include "Musical instrument" , "... as part of orchestra" , "Low-pitched string instrument" , "One taking a bow" , "Stringed instrument" .)

I've seen this clue in The Independent.

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