Adjective
clacky (comparative more clacky, superlative most clacky)
(informal) Being or making a clack sound.
clacky heels
the clacky sound of a typewriter
Instead of a high-pitched, clacky echoing around your local café, you'll now hear a slightly lower, less nervous sound. Source: Internet
Sometimes, footsteps are loud and clacky, as if your stalker is in the room with you. Source: Internet