Claytons · adjective1
From a non-alcoholic drink called Claytons named after the Clayton brothers and promoted in Australia and New Zealand in the 1980s as “the drink you have when you′re not having a drink”. The drink itself did not impress consumers and is now all but forgotten.
Claytons · proper noun2
See the etymology of the corresponding lemma form.
Etymology from Wiktionary, CC BY-SA 4.0.