Urinal eruption possibly counts? (7)
I believe the answer is:
peerage
'urinal' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for peerage that I've seen before include "The whole of the British nobility" , "Ranks of the nobility" , "The nobility en masse" , "The nobility as a group" , "Lordly group" .)