Possible Clues:

• Obstacles to progress
• Temporarily stopping individuals staggering from bars
• It's staggering on the athletics circuit - they can bring a stop to one's gallop
• Obstacles seen four times in this puzzle's completed grid?
• Hard to get over smut splattered on ostentatious showy stuff at apartments
• Obstacles
• Tripper-uppers
• Tripping in front of apartment buildings' barriers
• Hesitating in front of key closers creates obstacles