Show great excitement as wife leaves cheat (6)
I believe the answer is:
sizzle
'show' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their base form.
Perhaps there's a link between them I don't understand?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for sizzle that I've seen before include "Make a hissing sound while frying" , "Fizz in the pan" , "Sound of a spitting sausage?" , "Frying hiss" , "Hot hiss" .)