Like an unexplained creaking sound (5)

I believe the answer is:

eerie

(Other definitions for eerie that I've seen before include "Strangely frightening" , "Weird and disturbing" , "Spectral" , "Ghostly" , "Awesome" .)

I've seen this clue in The Wall Street Journal.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.