Something that clawks or makes harsh, sharp sounds; something impressive or remarkable in size or quality.
From clawk (to make harsh sounds) plus -er (agent noun suffix). The extension from 'sound-maker' to 'something remarkable' likely comes from dialect usage where 'clawker' meant something striking or notable.
This is a regional word that shows how English dialects create new words by just adding -er to verbs—same way a 'baker' bakes or a 'worker' works. Some dialects use 'clawker' to mean something impressively big or good, proving one word can do totally different jobs in different places.
Complete word intelligence in one call. Free tier — 50 lookups/day.