Related Clues:

• 'Pats at, with a cloth, say (4)'
• The sort of complaint one might have at being made game of
• They do not do a good turn to the South, and that's flat
• The fingerprints of flatfish
• The fish have turned rotten at first, and that's flat
• Fishy form of fingerprints
• Physicist's symbol for density
• A Greek letter
• Flat and fishy fingerprints
• P, to Pythagoras
• Applies in light strokes
• It's between pi and sigma
• Paints quickly
• Uses the corner of a napkin, say
• Touches down first, on special braking system