'clearly-produced' originates from the combination of 'clear' and 'produce,' where 'clear' meant 'easy to perceive' and 'produce' meant 'to create or bring forth.'

'clearly-produced' changed from the combination of 'clear' and 'produce' in Middle English and eventually became the modern English term 'clearly-produced.'

Initially, it meant 'something made in a clear manner,' and this meaning has largely remained the same in modern usage.