A seamstress, or an underground channel for wastewater
.... sewer 
| sewed [past tense] | sewn [past participle] | sewing [present participle] | sews... [DOC] [TLE] sewing-machine operators - Memidex dictionary/thesaurus [PAR] a large pipe, usually underground, which is used for carrying waste water ... | "
open sewer": a channel for carrying away waste water and waste from ... (25 of 
73... [DOC] [TLE] SEWER - Crossword Clues | Wordplays.com [PAR] Provider of an underground takeaway service for the public (5).