Formal ruling on a point of Islamic law (5)
I believe the answer is:
fatwa
'formal ruling on a point of islamic law' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for fatwa that I've seen before include "Legal ruling by Islamic religious leader" , "Islamic decree" , "death sentence?" , "Ruling by Islamic leader, as on Salmon Rushdie" , "Ruling or sentence by Islamic religious leader" .)