You might consider one of these a suitable synonym of ‘clothesmaker’. All the other possible candidates I find over-specific, either historically or in terms of what garments they make/made.

See also the final section of Nouns (just above Verbs) in the link below, but be aware that most of them make/made just one type of garment (this might actually be suitable for the context if well chosen). Wiktionary will give you a good impression of each.