gistfile1.js

var someElementRef;

// ... time passes and someElementRef gets filled. Now we can do:
$(someElementRef).find(".some .fun .selector");

// Or, even better, cache the jQuery result before doing the above
// Only run this once so we don't keep re-jQueryifying
someElementRef = $("#bob");

// Hammer this object with .find() as often as desired
someElementRef.find(".some .fun .selector");