Related Clues:

• Tonic (mus.)
• First note in a scale
• First musical note
• Money Sweden brought out, a note
• Homer Simpson's 'contribution' to the 'OED'
• 'It was only OK'
• Word of indifference
• Play follower
• 'I'm not feelin' it'
• "I'm not feelin' it"
• Homer's grunt
• "Whatevs"
• "It's okay, I guess"
• Cry from 13-Across
• 'Silly me!'