IPA: /ˈklæmərə/
KK: /ˈklæmərər/
A person who makes a loud and persistent noise or demands attention, often in a disruptive way.
The clamorer outside the building was shouting for everyone to hear him.
Clamorer is formed from "clamor" (from Latin "clamor", meaning a shout or cry) and "-er" (meaning a person who). The word refers to a person who makes loud noises or shouts, often in a disruptive manner.
Think of someone who is making a loud 'cry' ('clamor') — the '-er' indicates that this person is the one making the noise.