A Toothed Wheel
This page is the CodyCross answer for the clue below from Sense of Smell, Group 1467, Puzzle 5 (Popcorn Popping).
Question is: A Toothed Wheel
and the answer is: SPROCKET
Word Meaning:
SPROCKET — (mechanical engineering) A toothed wheel that enmeshes with a chain or other perforated band.
Definitions from Wiktionary.