The most common and most likely answer to this crossword clue is the 10 letter word SPUTTERING
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result SPUTTERING
Buddy explains!
The straight part
We know that "jabbering" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case jabbering = sputtering.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SPUTTERING mean?
SPUTTERING verb- To emit saliva or spit from the mouth in small, scattered portions, as in rapid speaking.
- To speak so rapidly as to emit saliva; to utter words hastily and indistinctly, with a spluttering sound, as in rage.
- To throw out anything, as little jets of steam, with a noise like that made by one sputtering.
- To cause surface atoms or electrons of a solid to be ejected by bombarding it with heavy atoms or ions.
- To coat the surface of an object by sputtering.
- A noise that sputters.
- The ejection of atoms from the surface of a solid or liquid following bombardment with ions, atoms or molecules; used to prepare a thin layer of material on an object.