Related Clues:

• 'Beats me!'
• Ho-hum
• So-so
• Mediocre
• 'Maybe'
• See 107-Across
• 'Could be better'
• Hardly thrilling
• Unconvincing concurrence
• 'Ain't got a clue'
• 'Don't ask me'
• 'I have no idea!'
• 'Beats me'
• Expression of bafflement
• [Yawn]