What soothsayer may have peddled got Royals excited (9)
I believe the answer is:
astrology
'what soothsayer may have peddled' is the definition.
I can't tell whether this definition defines the answer.
'got royals excited' is the wordplay.
'excited' is an anagram indicator.
'got'+'royals'='gotroyals'
'gotroyals' is an anagram of 'ASTROLOGY'.
Can you help me to learn more?
(Other definitions for astrology that I've seen before include "Fortune-telling from the stars" , "The telling of fortunes through the movement of planets" , "It claims divination by the positions of the planets" , "Interpretation of celestial bodies as having an influence on human affairs" , "Star divination" .)