Solar event (7)
I believe the answer is:
'solar event' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eclipse that I've seen before include "Obscure, as moon may the sun" , "Heavenly phenomenon" , "When one celestial body obscures another" , "Heavenly event; drake's time of dull plumage" , "Celestial obscuration of light" .)