Appeal to a person to buzz off (6)

I believe the answer is:

begone

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But I can't explain it at all! Could you help me understand?

(Other definitions for begone that I've seen before include "shove off" , "Archaic injunction to go away" , "get lost" , "Archaic command to go away, banish" , "Archaic command to buzz off" .)

I've seen this clue in the Evening Standard.

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