Perhaps one vaccinating rabbit (6)

I believe the answer is:

jabber

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'rabbit' is the definition.
(I know that rabbit can be written as jabber)

I don't understand the rest of the clue.

(Other definitions for jabber that I've seen before include "Gabble, talk rapidly" , "empty prattle" , "Talk rapidly with little sense" , "One possibly taking a poke" , "Talk fast like a monkey" .)

I've seen this clue in The Times.

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