Perhaps, a monarch earning extensive royalty, for starters (5)
I believe the answer is:
ameer
'perhaps a monarch earning extensive royalty for starters' is the definition.
I can't judge whether this defines the answer.
'a monarch earning extensive royalty for starters' is the wordplay.
'for starters' suggests taking the first letters.
The initial letters of 'monarch earning extensive royalty' is 'meer'.
'a'+'meer'='AMEER'
Can you help me to learn more?
(Other definitions for ameer that I've seen before include "Former ruler's title in Afghanistan" , "Muslim leader" , "Asian dignitary" , "Eastern potentate (variant spelling)" , "Muslim prince's title" .)