The term 'GYM SPECIMEN' can be broken down into two crossword solutions: STUD (4 letters) and BOD (3 letters). STUD is an informal term for a student, usually referring to someone who is attending college or university. BOD is an abbreviation for body, which is the physical form of a person or animal. Together, these two words can be used to describe someone who is in good physical shape, often due to regular exercise at a gym.