The most common and most likely answer to this crossword clue is the 6 letter word ORATES
O
R
A
T
E
S
More clues leading to the result ORATES
Buddy explains!

The straight part
We know that "Speaks" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case speaks = orates.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 ORATES mean?
ORATES verb- To speak formally; to give a speech.
- To speak passionately; to preach for or against something.