Turn (in)

SCREW

Fastener that tightens with a twist, often used in wood or metal.

The clue "Turn (in)" hints at the word "screw," which can mean to turn something, like a screw into wood. The word "in" suggests inserting or turning inward, reinforcing the idea of screwing something in. It’s a straightforward play on the dual meaning of "screw" as both a noun and a verb related to turning.