Surprise result having advantage over Egyptian deity (5)
I believe the answer is:
upset
'surprise result' is the definition.
(I've seen this before)
'having advantage over egyptian deity' is the wordplay.
'having advantage' becomes 'up' (the team in the lead is described as 'up').
'over' is a charade indicator (letters next to each other).
'egyptian deity' becomes 'set' (Set is an example).
'up'+'set'='UPSET'
(Other definitions for upset that I've seen before include "Caused grief" , "Put out" , "Surprising result" , "Knock over; worried" , "Overturn, spill" .)