Answer: chimneysweep

AnswerCrossword Clue
CHIMNEYSWEEP

One who works with the flue

CHIMNEYSWEEP

Bert, in "Mary Poppins"

CHIMNEYSWEEP

What Mr. Gamfield wanted Oliver Twist to be.

CHIMNEYSWEEP
Dick Van Dyke, in "Mary Poppins"
CHIMNEYSWEEP
Not a job for a claustrophobe