I can think in some workarounds to make it easier for you: * Ask that publisher to meet in person, face to face is usually easier. * Ask it to send you the queries for you to answer by email. * Ask to be send the questions beforehand, write your answers and read them during the phone call (if you are one of those sutterers that have an easier time reading) * Practice phone calls. And of course, disclosure your stutter during the phone call (or before). Good luck!