The most common and most likely answer to this crossword clue is the 12 letter word MONOSYLLABIC
I've seen this crossword clue in The Times
M
O
N
O
S
Y
L
L
A
B
I
C
More clues leading to the result MONOSYLLABIC
Buddy explains!

The straight part
We know that "barely talking" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case barely talking = monosyllabic.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 MONOSYLLABIC mean?
MONOSYLLABIC noun- A word consisting of one syllable
- Consisting of one syllable.
- Using monosyllables, speaking in monosyllables; curt.