Related Clues:

• Distinctive mark
• Mark, abstract art genius
• Pop art genius giving autograph
• Squiggle perhaps one minor irritant — certain to cover it
• Yes — Italian character receives good endorsement
• As Turing deciphered Enigma, initially used to identify someone
• Uncontrollable urge isn't a mark of identification
• Personal mark
• Tune that can make a singer's name
• Endorsement for Sicilian leaders' good temperament
• (In music) the sharps or flats that follow the clef and indicate the key
• Identifying script
• One's name in one's own writing
• It's found at the bottom of many works of art
• Is over Midge Ure's autograph!