The most common and most likely answer to this crossword clue is the 8 letter word CHATTIER
C
H
A
T
T
I
E
R
Buddy explains!
The straight part
We know that "more informal" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case more informal = chattier.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 CHATTIER mean?
CHATTIER adjective- Of a person, chatting a lot or fond of chatting.
- Of a text or speech, expressed in a conversational style.
- Supplying more information than necessary; verbose.
- Infested with lice; or, dirty, worn or of poor quality; lousy.