Related Clues:

• On the -- (discreetly)
• Secrecy, with 'the'
• On the -- (secretly)
• On the (discreetly)
• What discreet acts are done on, with 'the'
• What discreet acts are done on, with "the"
• U-turn from "up high" (2 words)
• 'Up top!' follower