Certain plays made morals uncertain (10)

I believe the answer is:

melodramas

'certain plays' is the definition.
(type of drama)

'made morals uncertain' is the wordplay.
'uncertain' indicates an anagram.
'made'+'morals'='mademorals'
'mademorals' with letters rearranged gives 'MELODRAMAS'.

(Another definition for melodramas that I've seen is " Productions".)

I've seen this clue in The Telegraph.

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