Possible Clues:

• Composer of many musicals ...
• Peter's brother was warned once
• See boy wander aimlessly
• Composer Lloyd Webber
• There's something saintly afresh about the doctor
• Charles's younger brother
• November thirtieth is this saint's day
• - Motion, Poet Laureate
• Saint and merry man, characters in 'The Warden'
• Once more, accepting doctor as saint