Answer:

reinin

Answer	Crossword Clue
REININ	Check, as a horse
REININ	Pull, as a horse
REININ	Put a lid on

REININ	Pull back
REININ	Hold back
REININ	Curb, as a runaway horse
REININ	Try to control, as a runaway horse
REININ	Curb, as spending
REININ	Restrain
REININ	Get to slow down
REININ	Keep under control

REININ	Bring under control
REININ	Control
REININ	Get under control
REININ	Keep from getting out of control
REININ	Harness
REININ	Slow up a horse.
REININ	Slow down.
REININ	Slow

REININ	Not let go wild
REININ	Curb
REININ	Check
REININ	Not let run wild
REININ	Control, as expenses
REININ	Control, as costs
REININ	Check a horse?
REININ	Curtail