Possible Clues:

• "__ a girl who sang the blues": McLean lyric
• '___ a Man,' John Ciardi poetry collection
• '___ a man who wasn't there'
• "How ___ Your Mother"
• "Since --- You Baby" (1956 hit)
• '___ him on a Monday' (Crystals lyric)
• ''...--- a man with seven wives''
• The Shirelles' ''--- Him on a Sunday''
• '___ a man with ...'
• 1956 tune, "Since ___ You Baby"