Essentially considers politicians to be servants of evil (4)
I believe the answer is:
imps
'servants of evil' is the definition.
The answer and definition can be both people as well as being plural nouns.
Maybe there's an association between them I don't understand?
'essentially considers politicians' is the wordplay.
'essentially' says to take the centre.
'politicians' becomes 'MPs' (Members of Parliament).
The centre of 'considers' is 'i'.
'i'+'mps'='IMPS'
'to be' is the link.
Can you help me to learn more?
(Other definitions for imps that I've seen before include "Cheeky little devils" , "naughty children" , "Naughty sprites" , "Little rascals" , "Small devils or mischievous children" .)