Designed to attach by means of a clip: clip-on earrings. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "clip-on" in a sentence
"Adam has a window fan; Elayna has a clip-on bedside table fan and a stand fan."
"For those who cannot tie their own bow ties, there are plenty of clip-on or ready-tied versions on the market, including those made from satin and velvet."
"What I've been seeing is the more structured bow tie—the hand-stitched, clip-on, simple solution."