Handheld Timing Device Used by Sportspeople
Puzzle 19 of Words that Rhyme Piece of Cake Pack
Question is: Handheld Timing Device Used by Sportspeople
and the answer is: STOPWATCH
Word Meaning:
STOPWATCH — A timepiece designed to measure the amount of time elapsed between a particular time when activated and when the piece is deactivated.
Definitions from Wiktionary.