Possible Clues:

• Insider's lingo
• Glass of beer? Fortified drink from south, in trade terms
• Clash mostly over slang
• Originally journalistic element in specific language
• Journalese or legalese, say?
• Vessel almost disappeared in words of the trade
• Specialised vocabulary of a group
• Element underpinning start of joint talk for specialists?
• Japanese gas, using vernacular
• Shop talk and pint almost finished