Related Clues:

• Unmoved one
• Floating lettuce?
• Philosophical
• Salad choice
• Hard-to-get-to-know person, so to speak
• Romaine alternative
• Uncordial one
• Impassive one
• Hardly emotional
• Unmoved
• Unexcitable
• Stiff-upper-lip sort
• Hardly the screaming type
• Unemo-tional
• Greek philosopher