Related Clues:

• "The Alphabet Song" opening
• "Battle it out" quintet
• Guy's name that's an alphabet run
• Bassist Cook of Creedence Clearwater Revival
• Role in 'The Hangover'
• Country singer Phillips
• Letters after B
• Man's name that's an alphabet run
• Alphabetic threesome
• Group that ends '... and sometimes Y'
• Good name for an R.V. inhabitant?
• Gang of characters seen in the four longest answers
• Actor Gilliam
• Noteworthy features of rows 1-5, 6-10 and 11-15, in that order
• "___ and sometimes Y"