call–in 
/ˈkɑ:lˌɪn/ noun
plural call–ins /ˈkɑ:lˌɪn/ noun [count] US : a radio or television show in which telephone calls from members of the audience are included as part of the broadcast — usually used before another noun ▪ a call–in radio show —called also (chiefly Brit) phone-in; — see also call in 1b at 1call
