Fairy king in "A Midsummer Night's Dream” (6)
I believe the answer is:
oberon
'fairy king in a midsummer night's dream' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oberon that I've seen before include "top charmer!" , "Titania's consort" , "Fairy king (AMND)" , "MND fairy king" , "charming king" .)