Related Clues:

• "Clean and ___" (1988)
• Quite serious
• Trouble indicator
• Clear as a bell
• Solemn
• Reasonable
• Not dozing
• Not nodding
• Self-controlled
• 'Look out below!,' e.g.
• Abstemious
• Awake and aware
• Having pricked ears
• Not pickled
• Off the sauce