Watch flood outside European court (8)
I believe the answer is:
spectate
'watch' is the definition.
(spectating is a kind of watching)
'flood outside european court' is the wordplay.
'flood' becomes 'spate' ('spate' can be a synonym of 'flood'**).
'outside' is an insertion indicator.
'european' becomes 'e' (abbreviation e.g. EU).
'court' becomes 'ct'.
'e'+'ct'='ect'
'spate' going around 'ect' is 'SPECTATE'.
(Other definitions for spectate that I've seen before include "Watch (a game, etc)" , "Look on (at a match)" , "Be an onlooker" , "Watch (at sports event)" , "Observe" .)