A stag party is a celebration held for a man before he gets married, usually attended by his male friends and family. Participants of a stag party are known as 'stag party participants' and can include males and MEN. The term 'males' is used to refer to adult males, while the term 'MEN' is used to refer to any gender of adult. Therefore, the crossword solutions for the term 'stag party participants' are 'males' and 'MEN'.