The most common and most likely answer to this crossword clue is the 7 letter word MUTTERS
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More clues leading to the result MUTTERS
Buddy explains!

The straight part
We know that "talks indistinctly" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case talks indistinctly = mutters.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 MUTTERS mean?
MUTTERS noun- A repressed or obscure utterance; an instance of muttering.
- To utter words, especially complaints or angry expressions, indistinctly or with a low voice and lips partly closed; to say under one's breath.
- To speak softly and incoherently, or with imperfect articulations.
- To make a sound with a low, rumbling noise.