Possible Clues:

• High-powered firm
• Skirt with shirt for advanced rank
• Shirley ____, who admitted to occasional cigarette-smoking, won Olympic 100m hurdles silver in 1984
• Physically robust
• Pungent air around middle of restroom
• Mighty clear
• Single by Robbie Williams, released in 1999
• Well-muscled
• Muscular type of skinhead gets time, as it's an offence to lose the head
• Great in power