You’ll get the gist of what he sings (5)
I believe the answer is:
tenor
'you'll get the gist of what he sings' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
This is the entire clue.
Can you help me to learn more?
(Other definitions for tenor that I've seen before include "Caruso or Domingo" , "General meaning of a male voice" , "direction" , "Purport" , "exact words" .)