The term CERTAIN CLUB can be broken down into three separate crossword solutions: ELKS (4 letters), GLEE (4 letters), and ONEIRON (7 letters). The Benevolent and Protective Order of Elks, commonly known as the Elks Club, is a fraternal organization founded in 1868. The Elks Club is dedicated to charitable works, such as providing scholarships and supporting veterans and their families. GLEE Clubs are musical groups that typically perform choral music. They are often associated with universities and high schools, and they often perform at public events. Oneiron is a Finnish literary club founded in 1887. It is one of the oldest literary clubs in Finland, and it is dedicated to promoting literature and culture.