Ancient ruler of the Sun and Moon, maybe (7)
I believe the answer is:
solomon
'ancient ruler' is the definition.
'solomon' can be an answer for 'ruler' (I've seen this before). I am unsure of the 'ancient' bit.
'sun and moon maybe' is the wordplay.
'sun' becomes 'sol' (Latin for 'sun').
'and' says to put letters next to each other.
'maybe' indicates an anagram.
'moon' is an anagram of 'omon'.
'sol'+'omon'='SOLOMON'
'of the' is the link.
Can you help me to learn more?
(Other definitions for solomon that I've seen before include "Wise man" , "Wise old king of Israel" , "OT king" , "wise guy" , "Biblical wise king" .)