Possible Clues:

• Cry (colloq.)
• Shed tears if, say, onion's about
• Sob without restraint
• Informal word meaning to weep or sob
• Over onion, say, cry
• Sob childishly
• Perhaps onions, when cut up, make you cry
• Onion about to make you cry
• Britpop darlings ousting Queen for British No.1 makes you weep
• Turned up source of light whimper