A Thousand Clowns

from wiki:
A Thousand Clowns is a 1965 American film which tells the story of a young boy who lives with his eccentric uncle Murray, who is forced to conform to society in order to keep custody of the boy. The movie was adapted by Herb Gardner from his 1962 play, and directed by Fred Coe. Gardner based the Murray Burns character on his friend, Jean Shepherd, who is said not to have appreciated the gesture.

I heard about this from movie from The Sound of Young America\\\'s with interview with Barry Gordon
http://maximumfun.org/sound-young-america/barry-gordon-co-star-thousand-clowns-interview-sound-young-america