Unexplained spectacle (10)
I believe the answer is:
phenomenon
(Other definitions for phenomenon that I've seen before include "Remarkable thing" , "Observable event" , "(Remarkable) happening" , "Wonder" , "Marvel?" .)
I believe the answer is:
phenomenon
(Other definitions for phenomenon that I've seen before include "Remarkable thing" , "Observable event" , "(Remarkable) happening" , "Wonder" , "Marvel?" .)