Possible Clues:

• With mouth wide open a cavity's visible finally
• Wide-open, as a mouth
• Clearly surprised it's used for cooking next to gym
• Staring open-mouthed
• Awestruck, perhaps
• Love of one's fellow man, to Greeks
• Silver copy that is wide open
• Open-mouthed, Georgia's overwhelmed by primate
• Having the mouth wide open
• Catching flies, so to speak