I love picking apart clues that whisper of something ghostly or insubstantial — setters have a whole toolbox of signals they use to telegraph an 'ethereal' reading without shouting it. Often the simplest case is that 'ethereal' is the straight definition: you might see words like 'airy', 'spiritual', 'ghostly', 'gossamer' or 'otherworldly' tacked to one end of a clue to define the solution directly. But more fun is where the clue’s surface itself suggests airiness and the wordplay uses standard devices.
For example, anagram indicators that evoke movement or dispersal — 'scattered', 'blown', 'wafted', 'shaken' — are perfect for signaling letters being made insubstantial and rearranged into a word meaning ethereal. Hidden-word indicators like 'lurking in', 'seen in', or 'amid' can hide a thin, delicate answer inside a phrase. Homophone indicators such as 'sounds like', 'we hear', or 'reportedly' can give an ephemeral 'sound' sense. And when the entire clue reads as a neat little riddle with both definition and wordplay aligning, it might be an &lit clue where the whole thing feels misty and complete. I get a thrill when the surface and the mechanics both breathe that faint, spectral vibe, it makes solving feel like catching a wisp of fog.