Q,
Five Eyes = five EYES, five spies.
EYE = SPY
Black = hidden, double agent, secret
BLACK = HIDDEN
BLACK EYE = HIDDEN SPY
The Black Eye you mentioned previously is someone very high up in (((their))) organization who is able to tip hand in your favor as needed.
A traitor to them, a hero to us.
I've posted this before and people debate it. Some get it.