As per Spooner security staff arrived on bridge, perhaps (4,4)
I believe the answer is:
card game
'bridge perhaps' is the definition.
(bridge is a kind of card game)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for card game that I've seen before include "Poker or bridge" , "Poker or whist, say" , "'Rummy or bridge, say (4,4)'" , "solo, perhaps" , "nap perhaps" .)