Related Clues:

• Character voiced by Dan Castellaneta
• ''D'oh!'' exclaimer
• Dinner signal
• Bart Simpson's pop
• See 23 Across
• Phone pioneer
• School kids react to it
• Forever Stamp image
• Quasimodo's concern
• BCE word
• Base-clearing hit
• Plath's ''The ___ Jar''
• It uses a clapper
• Dinger on the diamond
• Green Monster clearer