Theatrical term for thermal energy (4)
I believe the answer is:
heat
'energy' is the definition.
(heat is a kind of energy)
'theatrical term for thermal' is the wordplay.
'HEAT' is hidden in amongst the letters.
But, I'm unsure how this is indicated.
Can you help me to learn more?
(Other definitions for heat that I've seen before include "Raise temperature" , "Warm up" , "Energy that causes a rise in temperature" , "It's measured in therms" , "Pressure" .)