People or things that clear away obstructions, debris, or unwanted material from an area.
From 'clear' (verb) plus '-er' (Old English suffix for agent nouns, meaning 'one who does'). Used since at least the 1600s to describe those employed in clearing land or removing obstacles.
Medieval 'clearers' were often enslaved or bonded laborers who literally shaped the European landscape by clearing forests for farmland—their physical labor is literally written into the geography we see today.
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