Man behind bars butchers butchered? (8)

I believe the answer is:

schubert

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'man behind bars' is the definition.
The definition suggests a singular noun which matches the answer.

'butchers butchered?' is the wordplay.
'butchered?' indicates anagramming the letters (I've seen this in other clues).
'butchers' with letters rearranged gives 'SCHUBERT'.

Can you help me to learn more?

(Other definitions for schubert that I've seen before include "Butchers (anag) - composer, d. 1828" , "Franz --, his Unfinished symphony is famous" , "Franz -, Austrian composer (Trout Quintet, etc)" , "Composer of song-cycle Winterreise" , "Austrian composer of the Trout piano quintet" .)

I've seen this clue in The Sun and The Telegraph.

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