Trio hiding in terror made no sense (5)
I believe the answer is:
tenor
'sense' is the definition.
(both can mean something's gist or meaning)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for tenor that I've seen before include "Pavarotti, maybe" , "Higher male voice" , "General course - male singer" , "Male singer with high register" , "High male singing voice like Pavarotti" .)