Filed from 3 published puzzles

JANITOR

Set to 3 different clues across 3 published puzzles, most often “Cleaning agent” — The New York Times, Thursday, 8 April 2004.

7 letters

Every clue on record, most used first

Cleaning agentonce
The New York Times — Thursday, 8 April 2004
After-hours job, maybeonce
The New York Times — Wednesday, 9 February 2000
Custodianonce
The New York Times — Sunday, 26 March 1995

Other answers to these clues

CARETAKER9 letters
SUPER5 letters