Filed from 4 published puzzles

TUNNEL

Set to 4 different clues across 4 published puzzles, most often “Path for a mole” — The New York Times, Monday, 8 March 2010.

6 letters

Every clue on record, most used first

Path for a moleonce
The New York Times — Monday, 8 March 2010
Prison escape route, maybeonce
The New York Times — Tuesday, 16 March 2004
Digonce
The New York Times — Friday, 19 July 2002
Burrowonce
The New York Times — Monday, 23 December 1996

Other answers to these clues

BARB4 letters
DELVE5 letters
DOYOUUNDERSTAND15 letters
GET3 letters
GETIT5 letters
GIBE4 letters
GOFOR5 letters
HOLE4 letters
INSULT6 letters
JAB3 letters
LAIR4 letters
MINE4 letters