The Clue Tireless workers?
The Answer SLEDS
The answer "SLEDS" fits the clue "Tireless workers" because sleds are used to carry heavy loads without getting tired. They glide over snow and ice, making it easy to transport goods. In a way, sleds work hard without needing rest, just like tireless workers. This clever play on words makes "SLEDS" a fun answer to the crossword clue.