*Storm-tracking aid

LIVER

Think of a body part that sounds like something you’d use to predict weather patterns.

This clue plays on the phrase "liver storm," an old nautical term for a violent storm at sea—so "storm-tracking aid" hints at something that helps monitor storms, which is a stretch but leads to "liver." The real trick is the homophone: "liver" sounds like "live er" (as in "live error"), but here it’s just a cheeky misdirect relying on obscure sailing lingo. Most solvers will groan once they see it, since the connection is more about wordplay than logic, but it’s a classic example of how crosswords sometimes bend meanings for fun.