The answer to the crossword puzzle is 'TEE, ' which is an apt shirt for a golfer. A TEE is a small wooden or plastic peg that is used to support a golf ball when it is hit off the ground. It is usually placed in the ground on a flat surface, such as a TEE box, and is used to elevate the ball slightly above the ground. This allows the golfer to hit the ball with more accuracy and power. TEE shirts are also a popular item of clothing worn by golfers, as they are comfortable and provide protection from the sun.