According to Dorothy L Sayers' novel The Nine Tailors, that quote refers to the fact that the death of a woman should be signalled to the parish by six tolling strokes ("tailors") of the great tenor bell, but that of a man by nine: hence "Nine tailors maketh [ie indicates] a man". This usage of "tailor" is confirmed by Chambers Dictionary -- "a teller stroke (bellringing, esp dialect".

≈M≈