Answer: reinsin

AnswerCrossword Clue
REINSINControls skinnier punk leaving kindergarten (5,2)
REINSINChecks
REINSINPulls back
REINSINRestrains
REINSINHolds back
REINSINCurbs
REINSINBrings under control
REINSINCauses to stop, as a steed.
REINSINConstrains.
REINSINGets control