God’s power curtailed southern town (5)
I believe the answer is:
pluto
'god's' is the definition.
(Pluto is an example)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for pluto that I've seen before include "Hellish leader" , "Greek lord of the underworld, and a planet" , "wartime acronym" , "Infernal ruler" , "cartoon character" .)