Decreed in advance (8)
I believe the answer is:
destined
'decreed in advance' is the definition.
(e.g. destined for glory)
This is all the clue.
(Other definitions for destined that I've seen before include "Fated, fore-ordained" , "Didn't see, being fated" , "Designated" , "Intended (for a particular end)" , "Intended; doomed" .)