Related Clues:

• What a friendly gesture from an Irishman
• Knock him up a little in Ireland
• Give one on the back to 15 across back there
• It's up to him to turn it on
• Square on toast
• Lightly apply
• Best way to get it down?
• Blot away, as a tear
• Emcee Sajak
• Apply with a cotton ball, say
• A little one will "do ya," in old ads
• Butter unit, in a restaurant
• Perfume application
• Fish - fingerprint
• Fingerprint - fish