Crossword Genius

Musical snob on convoluted reason cover can be discounted? (2-6,5)

Ross

I believe the answer is:

no-claims bonus

I'm a little stuck... Click here to teach me more about this clue!

'reason cover can be discounted?' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'musical snob on convoluted' is the wordplay.
'convoluted' is an anagram indicator.
'musical'+'snob'+'on'='musicalsnobon'
'musicalsnobon' anagrammed gives 'NO-CLAIMS BONUS'.

Can you help me to learn more?

(Other definitions for no-claims bonus that I've seen before include "Insurance premium reduction after a period without a prang, for example in a car" , "Insurance benefit" , "Insurance discount" .)

I've seen this clue in The Guardian.
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