The most common and most likely answer to this crossword clue is the 6 letter word CACKLE
I've seen this crossword clue in The Daily Telegraph
C
A
C
K
L
E
Buddy explains!

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 CACKLE mean?
CACKLE noun- The cry of a hen or goose, especially when laying an egg.
- A laugh resembling the cry of a hen or goose.
- Futile or excessively noisy talk.
- A group of hyenas.
- To make a sharp, broken noise or cry, as a hen or goose does.
- To laugh with a broken sound similar to a hen's cry.
- To talk in a silly manner; to prattle.