In opera, could he turn up in a coronet? (5)
I believe the answer is:
tenor
'in opera could he turn up' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'a coronet?' is the wordplay.
'TENOR' is hidden back-to-front within the letters.
But, I am unsure how this is indicated.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for tenor that I've seen before include "Singer; drift" , "Drift of thought" , "Caruso or Domingo" , "Male singer with high-pitched voice" , "Eg, Placido Domingo" .)