Possible Clues:

• Levies of one-tenth, to church perhaps
• Tenths of income once paid to church
• One of the little birds of 14 down he is, or only small parts thereof
• They're a little bit birdy and masculine
• Such bits used to tax the little male birds
• Tenths for the Church
• Church supporters
• Collection plate amounts
• Get bits of small male birds for the church
• Sit back collecting the taxes