Evil spirits taking part in demonstration (6)
I believe the answer is:
demons
'evil spirits' is the definition.
(I know this)
'part in demonstration' is the wordplay.
I cannot quite see how this works, but
'part' could be 'mons' (mons is a kind of part) and 'mons' is located in the answer.
The remaining letters 'de' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'taking' acts as a link.
Can you help me to learn more?
(Other definitions for demons that I've seen before include "Fiends or devils" , "Evil spirits, devils" , "Wicked people" , "Evil supernatural beings" .)