Wicked one veiled or camouflaged (8)
I believe the answer is:
evildoer
'wicked one' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'veiled or camouflaged' is the wordplay.
'camouflaged' indicates anagramming the letters (I've seen this in other clues).
'veiled'+'or'='veiledor'
'veiledor' with letters rearranged gives 'EVILDOER'.
Can you help me to learn more?
(Other definitions for evildoer that I've seen before include "Malefactor" , "Over idle (anag) - villain" , "miscreant" , "sinner" , "Wicked person" .)