Warnings about Conservative powers (6)
I believe the answer is:
forces
'powers' is the definition.
('force' can be a synonym of 'power')
'warnings about conservative' is the wordplay.
'warnings' becomes 'fores' (I can't justify this - if you can you should give a lot more credence to this answer).
'about' is an insertion indicator.
'conservative' becomes 'C' (UK political abbreviation).
'fores' placed around 'c' is 'FORCES'.
Can you help me to learn more?
(Other definitions for forces that I've seen before include "Troops; makes" , "Prizes" , "Compels someone to do something" , "Compels, obliges" , "Troops and weaponry" .)