Paper seller (9)
(Other definitions for stationer that I've seen before include "Seller of paper, pens, etc" , "One assigning position" , "bookseller" , "Retailer of writing materials etc" , "Poster" .)
(Other definitions for newsagent that I've seen before include "Guardian seller?" , "daily shop" , "Shopkeeper selling magazines" , "shop selling rags?" , "paper supplier" .)