Possible Clues:

• Looking back, positive response to a firm who produced red roses for me (1'5)
• 'The Plough and the Stars' playwright Sean
• 'Yes, a company needs to be turned round', says Irish dramatist(1'5)
• 'The Dublin Trilogy' dramatist
• Irish dramatist Sean
• He awarded himself red roses on stage
• Abbey Theatre luminary
• Abbey Theater playwright
• Dramatist in old suit appearing before end of play
• Sean ..., author of 'The Plough and the Stars'