Spritely ruler in Borneo collapsed (6)
I believe the answer is:
oberon
'spritely ruler' is the definition.
I can't judge whether this defines the answer.
'borneo collapsed' is the wordplay.
'collapsed' indicates anagramming the letters.
'borneo' with letters rearranged gives 'OBERON'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for oberon that I've seen before include "King of the fairies (AMND)" , "Spirited king" , "MND fairy king" , "Shakespearean role" , "Titania's husband" .)