Possible Clues:

• Foot of verse
• Fairy queen I confuse in poetic measure
• Hamlet's ''To be,'' for one
• da-DUM
• One foot in 'the grave,' poetically speaking
• Petrarchan unit
• Rubaiyat bit
• 'To be,' e.g.
• Anapest's relative
• Seems I'm just a little b---with only one foot