Man pages matching name clear_keybuf in section 3alleg4:

clear_keybuf.3alleg4.en	debian 10 / allegro4-doc
clear_keybuf.3alleg4.en	debian 11 / allegro4-doc
clear_keybuf.3alleg4.en	debian 12 / allegro4-doc
clear_keybuf.3alleg4.en	debian 13 / allegro4-doc