From Longman Dictionary of Contemporary Englishtannertan‧ner /ˈtænə $ -ər/ noun [countable] BOTIMsomeone whose job is to tan animal skins (=make them into leather by treating them with a special acid)
Examples from the Corpus
tanner• He had been a leather merchant and a tanner, and had been involved in some disreputable affair.• Also patrons to cobblers, saddlers, shoemakers, and tanners.• Smiths, wheelwrights, butchers, tanners, graziers and husbandmen had direct links with the rural hinterland.• But since the hides were cheap, tanners soon solved the problem.• We are told that tanners used this gallery.• You bet him sixpence he could not eat a maggot and he promptly swallowed a live one and grabbed your tanner. 