The most common and most likely answer to this crossword clue is the 8 letter word SCHMOOZE
I've seen this crossword clue in The Times
S
C
H
M
O
O
Z
E
More clues leading to the result SCHMOOZE
- School maiden has to discharge gas
- Friendly chat with head of security about Her Majesty and leak
- Gas that is to escape slowly after houseroom evacuated
- He zooms around outside clubs to talk ingratiatingly
- School videoconferencing platform returning electronic chat
- Half of mush to percolate and circulate
- Gossip comes home half drunk, after drinking unknown quantity
- 4 Talk idly seeing school matron at first – escape slowly
- School matron’s first to exude gossip
- School magazine’s first leak providing gossip
Buddy explains!

The straight part
We know that "Gas" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gas = schmooze.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 SCHMOOZE mean?
SCHMOOZE noun- A casual conversation, especially one held in order to gain an advantage or make a social connection.
- To talk casually, especially in order to gain an advantage or make a social connection.