A demonic boss will leave you in stitches (8)
I believe the answer is:
comedian
'you in stitches' is the definition.
The definition suggests a singular noun which matches the answer.
'a demonic boss will' is the wordplay.
'a demonic' can be anagrammed to 'COMEDIAN'.
However, I'm unsure how this is indicated.
'leave' is the link.
Can you help me to learn more?
(Other definitions for comedian that I've seen before include "scream?" , "Any Python for instance" , "Demoniac (anag.)" , "Humorist" , "Demoniac kind of funny man" .)