Related Clues:

• Gelid
• In the 20's, say
• Very cold
• Slippery surface
• Displaying no emotion
• Rocky
• Poker-faced
• Word with duck or turkey
• Not even close
• Merciless
• In need of salt?
• Hardly gregarious
• It can precede the starts of 20- and 58-Across and 11- and 29-Down
• Far from welcoming
• Much less than cordial