Crossword Genius

Choose gal misbehaving, old enough to be taught a lesson? (6-3)

Ross

I believe the answer is:

school-age

'old enough to be taught a lesson?' is the definition.
(old enough for school)

'choose gal misbehaving' is the wordplay.
'misbehaving' indicates anagramming the letters.
'choose'+'gal'='choosegal'
'choosegal' anagrammed gives 'SCHOOL-AGE'.

I've seen this clue in The Times.
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