Possible Clues:

• Poitier of film
• "Rage of Angels" author Sheldon
• ''Serpico'' director Lumet
• Mr. Poitier
• Sir Philip's untimely end is seen when in retreat
• "Windmills of the Gods" author Sheldon
• Soldier-poet and defender of verse killed in action
• Poet in state capital, heard but not seen
• Died of wounds, but not in the defence of poetry
• Could be Sir Philip Denis out with Yorkshire opener