A no-frills shirt is a type of shirt that is basic and simple in design. It typically has no extra features such as pockets, buttons, or embroidery. The term 'no-frills' is often used to describe products that are inexpensive and basic. In this case, the crossword solution for the term 'no-frills shirt' is 'TEE, ' which is an abbreviation for t-shirt. A t-shirt is a type of shirt that is usually made of cotton and has short sleeves and a round neckline. It is a popular type of clothing that is often worn casually.