Longman Dictionary of Contemporary English
Douglas Harper's Etymology Dictionary
sound as of a horse's hooves, 1884, imitative.
Wiktionary
n. (context onomatopoeia English) The sound of shoed foot– or hoof-steps on hard ground. vb. To make a clip-clop noise.
Usage examples of "clip-clop".
Once, the Latin mistress was moved by the spring of the year to sing a folksong to fit the clip-clop of the ponies and carts, and Miss Brodie held up her index finger with delight so that her own girls should listen too.
They clapped and hollered while Joe rat-a-tat-tatted his feet and collided with Nancy, clip-clopped wobbly-kneed away, wavered off-balance, recovered, and kept on thumping his feet.
The French women--traditionally the most smartly dressed women in the world--wore shabby coats of sheepskin instead of wool and platform shoes of wood, so that the sound of women walking the streets of Paris resembled the clip-clop of horses' hooves.
Within seconds his keen hearing caught the soft clip-clopping of a walking horse.