A little of the mighty (4)
I believe the answer is:
emir
'a little' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for emir that I've seen before include "Arabian ruler" , "Eastern chieftain" , "Arab prince" , "Ruler or chieftain in Arabia" , "Muslim ruler stuck in mire" .)