Possible Clues:

• Stephen Foster's was beautiful
• This writer is taken in by dull unrealistic person?
• See me in dull surroundings, I'm unrealistic
• Lord Dunsany told his tales
• Romantic daughter's a boring thing
• You, during REM sleep
• King of America, 3 in song
• One with his head in the clouds
• One fantasising
• Martin Luther King dull? Find me transfixed