Put on muscle

The crossword clue is asking for a phrase or expression that means to gain muscle and the answer is “toned up“. This phrase is commonly used to describe the process of getting a fit and muscular body by building muscle mass through exercise and proper diet. When someone is “toned up“, it means that their muscles are well defined and prominent, giving them a more athletic appearance. This phrase is often used in the context of fitness and bodybuilding to describe the desired outcome of a training program. Overall, “toned up” means to put on muscle and achieve a more muscular physique through physical activity and healthy lifestyle habits.