"Stick a ___ in it" (3)

I believe the answer is:

(Other definitions for pin that I've seen before include "Small object to fasten or attach" , "Fasten; a security code" , "Small brooch; skittle" , "Debit-card number" , "Peg or nail" .)

I've seen this clue in the Universal.

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.