Talk rapidly as one giving vaccinations? (6)
I believe the answer is:
jabber
'talk' is the definition.
(jabbering is a kind of talking)
'rapidly as one giving vaccinations?' is the wordplay.
I cannot really see how this works, but
'one' could be 'er' (I've seen this in other clues) and 'er' is present in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for jabber that I've seen before include "Talk fast like a monkey" , "empty prattle" , "Rapid (foreign) talk" , "One who digs" , "Person giving injection" .)