Crossword Genius

Sinful centre for troubadours (3)

Ross

I believe the answer is:

bad

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

'sinful' is the definition.
(thesaurus)

'centre for troubadours' is the wordplay.
'BAD' is hidden within the letters.
However, I am not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for bad that I've seen before include "Spoiled or evil" , "Harmful" , "Of poor quality" , "Stinking" , "not healthy" .)

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