Crossword Genius

Stern thing parents do with children (4)

Ross

I believe the answer is:

rear

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'stern' is the definition.
('rear' can be a synonym of 'stern')

I don't understand how the rest of the clue works.

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(Other definitions for rear that I've seen before include "Buck" , "Rare at the back" , "Raise; behind" , "Bring up - back end" , "Rise up at the back" .)

I've seen this clue in The Times.
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