Clerical satire is basically the same as estates satire which focus on the vices, not virtues, of the church.
Though St. Francis was against it, monks could make some good money. Chaucer is showing the monk here as being materialistic and uneducated – he’s probably a second son and just wants to hunt. Hunting = Ven (capture) > venery = Veneral (Venus, sex) & Venare (hunting). This monk hunts women.