Clue: Much-performed play, in more ways than one (3,5)
Answer: WAR HORSE
Explanation: Definition: Much-performed play
Double definition ('in more ways than one'), The 'play' titled WAR HORSE (which is much-performed for such a new play) is an adaptation by Nick Stafford of the novel of the same name by Michael Morpurgo. A WAR HORSE is also any play performed perhaps too often.