"Hainele croitoresei sunt verzi."

Translation: The clothes of the seamstress are green.

[crbratu]

croitor, croitoreasă = tailor (not accepted by DL - I reported it)
according to wiktionary, seamster (seamstress) means ”A person who sews clothes professionally”. That would be in Romanian ”cusător, cusătoreasă”

[Tony713682]

My answer "The clothes of the dressmaker are green." was marked as incorrect. I think that you would be hard put to find a seamstress in the western world nowadays but there are are still dressmakers around. At the very least both words should be acceptable.