Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
clip-on is a noun and adjective meaning "a device (as an earring, sunglasses, microphone etc.) that is attached by clips". It carries 2 recorded senses.
a device (as an earring, sunglasses, microphone etc.) that is attached by clips
Definitions, synonyms and semantic relations for clip-on come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.