Aristophanes, Ecclesiazusae 888-9 (web address 1), with scholion.
An ochlos is a mob or rabble (cf. omicron 1056, omicron 1057), but not here: the idiom di' o)/xlou ei)=nai or gene/sqai has the sense of being or becoming troublesome or tedious; cf. e.g. Thucydides 1.73.2, and see generally LSJ s.v. .
At this point of the comedy, the word 'this' (tou=to) refers to an old woman's singing, to which a young girl intends to "answer" (e)gw\ d' h)\n tou=to dra=|s a)ntai/somai, "if you do that, I will answer with my own song". Through the girl's words, Aristophanes highlights the fact that the audience will enjoy the funny situation, even if it may be tired of all that singing.