Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
clattery is an adjective meaning "a rattling sound as of hard things striking together". It carries one recorded sense.
a rattling sound as of hard things striking together
“a clattery typewriter”
“the clattery sound of dishes”
Definitions, synonyms and semantic relations for clattery come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.