Related Clues:

• Job-specific vocabulary
• Street lingo
• Terse refusal
• With 1-Across, is very important
• Insider's lingo
• Trade talk
• Lacks the skills
• Street talk, e.g.
• Insider’s vocabulary
• Quitter's contraction
• 'Out of the question'
• Insider's vocabulary
• Specialized talk
• Isn't able
• Idiom