Answer:

interest

Answer	Crossword Clue
INTEREST	Banking benefit
INTEREST	"And I'm already kind of bored with this, so clearly I don't have any ..."
INTEREST	Some Schedule B income

INTEREST	Bond payment
INTEREST	Shark's weapon?
INTEREST	Hobby
INTEREST	Most of the first house payment
INTEREST	Bank addition
INTEREST	Part of a mortgage payment
INTEREST	One source of income
INTEREST	Most of a mortgage payment, usually

INTEREST	Concern
INTEREST	Bank add-on
INTEREST	Mortgage payment part
INTEREST	Financial stake
INTEREST	Personal concern
INTEREST	Charge on a loan
INTEREST	Principal's counterpart
INTEREST	Capital's share from industry.

INTEREST	Concern.
INTEREST	Engage the attention of.
INTEREST	Share in something.
INTEREST	Importance.
INTEREST	Feeling of concern.
INTEREST	Share.
INTEREST	Benefit
INTEREST	Bankers' concern

INTEREST	Savings-book entry
INTEREST	Borrower's burden
INTEREST	Bank bonus
INTEREST	Source of income or outgo
INTEREST	This may be simple or compound
INTEREST	Bond bonus
INTEREST	Personal influence
INTEREST	Item raised by some sharks

INTEREST	Depositor's concern
INTEREST	Rate of return on investments
INTEREST	Bank offering
INTEREST	Loan shark's vigorish
INTEREST	What banks give and receive