What does the cryptic crossword clue "One puts the squeeze on Tom's team (10)" mean?

The definition part of the clue is "One". The answer is THUMBSCREW. Explanation: THUMB’S CREW

One puts the squeeze on Tom's team (10)

Guardian Puzzle #28461 13 Across 2021-06-02

Definition

One

Explanation

THUMB’S CREW

Source: Fifteensquared

Answer

THUMBSCREW