Answer: reinsin

AnswerCrossword Clue
REINSIN

Controls skinnier punk leaving kindergarten (5,2)

REINSIN

Checks

REINSIN

Pulls back

REINSIN
Restrains
REINSIN
Holds back
REINSINCurbs
REINSINBrings under control
REINSINCauses to stop, as a steed.
REINSINConstrains.
REINSINGets control