One newly in power backing criticism applied to location mostly (7)
I believe the answer is:
parvenu
'one newly in power' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for parvenu that I've seen before include "An upstart, new arrival to society" , "Newly rich person" , "One newly risen to wealth or power" , "Johnny-come-lately, upstart" , "One who climbs" .)