New creator of energy (7)
I believe the answer is:
reactor
'energy' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'new creator' is the wordplay.
'new' indicates an anagram.
'creator' with letters rearranged gives 'REACTOR'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for reactor that I've seen before include "Provider of nuclear power" , "(Nuclear) powerplant" , "Nuclear power station core" , "Nuclear installation" , "I swing back" .)