Clue: Grinding of her teeth prefaces 10's moral tale (3,5,6,4)
Answer: THE THREE LITTLE PIGS
Explanation: Definition: moral tale
I think this is Paul being at his most outrageously / wittily (depending on your view) inventive: a charade of THETHREE, an anagram ('grinding') of 'her teeth' plus LITTLE PIG (HAM-LET, '10') plus S (the apostrophe s from the clue).