Show A Clean Pair Of Heels Meaning

Example : 1859, Charles Dickens, Richard Maxwell, editor, A Tale of Two Cities[1], Book the Second, Penguin Classics, ISBN 9780141439600, published 2003, Chapter XXIV, page 249:  â€˜[...]No, gentlemen; he'll always show ’em a clean pair of heels very early in the scuffle, and sneak away.’1977, Brian Schofield, Gerald Jordan, editor, Naval Warfare In The Twentieth Century 1900—1945[2], Taylor & Francis, ISBN 9780844810140, ‘Jacky’ Fisher, HMS Indomitable and the Dogger Bank Action: A Personal Memoir, page 66:  The two German ships soon showed us and the battle-cruiser Indefatigable in company, a clean pair of heels, though the cruiser HMS Dublin managed to keep them in sight untilt hey disappeared into the Straits of Messina to coal.2005 April 2005, Bernard Brown, “The Sherlock Holmes of ‘G’ Division”[3], in Dan Norder, editor, Ripper Notes, number 22, Inklings Press, ISBN 9780975912935, page 33:  During the melee the suspect had run off, showing a clear pair of heels.