Danny La Rue
Ⅰ
adjective blue, applied to any shade whether actual or figurative. Rhyming slang, formed on the name of popular 'comic in a frock' Danny La Rue (b.1926) UK, 1992
Ⅱ ⇨ Danny La Rue; Danny
noun a clue. Rhyming slang, based on popular 'comic in a frock' Danny La Rue (b.1926) UK, 2002