Related Clues:

• Ump's outstretched-arms call
• Hotel repository
• Hard to rattle
• Not tagged in time
• Even-tempered
• Calm, ___ and collected
• Slangy-but-enduring term of approval
• Less than chilly
• In good hands
• First call?
• In an ark, say
• Place for gems
• Money holder
• "Sounds great"
• Heist target