Group of supporters (3,4)
(Other definitions for fan club that I've seen before include "Keep place of entertainment cool" , "Fervent admirers" , "for keen patrons" , "Group devoted to a celebrity" , "Admiration society" .)
(Other definitions for ayes that I've seen before include "Sounds of agreement" , "Votes of approval during 5 Down" , "They express assent" , "Affirmative votes as in committee" , "The yes-votes at committee meeting" .)