Surpass celestial event (7)
I believe the answer is:
eclipse
This clue is a double definition.
'surpass' is the first definition.
(eclipsing is a kind of surpassing)
'celestial event' is the second definition.
(I've seen this in another clue)
(Other definitions for eclipse that I've seen before include "Blot out" , "A deliquium" , "Deprive of prominence" , "Throw into shade, like a heavenly body" , "Dull time for male duck" .)