What is an example of allusion in Romeo and Juliet?

There is not an obvious allusion in this scene; the closest is probably when Tybalt uses the word "consortest" which refers to a group of musicians which then gives a whole new meaning to the conversation. Mercutio wants to discuss this meaning while Tybalt does not want to discuss musicians, fiddlesticks (bows) or anything else. He wants to wield his sword (fiddlestick) and get on with the duel.