Hot-blooded popular, vocal circus types (7)

I believe the answer is:

intense

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'hot-blooded' is the definition.
(thesaurus)

'popular vocal circus types' is the wordplay.
'popular' becomes 'in'.
'vocal circus types' becomes 'tense' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in'+'tense'='INTENSE'

Can you help me to learn more?

(Other definitions for intense that I've seen before include "Fierce - deep" , "Great" , "Strong in quality or degree - perhaps a feeling" , "Concentrated, deeply felt" , "Deeply felt - extreme" .)

I've seen this clue in the Irish Times.

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