### Clue: Revived a festival introduced by Magritte and Dali, originally (10)
### Answer: REAWAKENED 
 ### Explanation: Definition: Revived
An envelope ('introduced by' – I am not convinced by the 'by') of 'a' plus WAKE ('festival') in RENÉ (first name, 'Magritte') plus D ('**D**ali, originally').