Chatterbox (6)

I think it could be either:

talker

gasbag

'chatterbox' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for gasbag that I've seen before include "Excessive chatterer" , "I talk too much" , "bore" , "One talks at length on boring topics" , "Prattler" .)

I've seen this clue in The Guardian, the King Feature Syndicate, the Sydney Morning Herald, the Newsday, The Telegraph and The Times.

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