Filed from 2 published puzzles

GROK

Set to 2 different clues across 2 published puzzles, most often “Understand, slangily” — The New York Times, Wednesday, 30 March 2011.

4 letters

Every clue on record, most used first

Understand, slangilyonce
The New York Times — Wednesday, 30 March 2011
Understandonce
The New York Times — Friday, 5 September 2003

Other answers to these clues

DIG3 letters
GET3 letters
GETIT5 letters
GETME5 letters
GRASP5 letters
READ4 letters
SEE3 letters
THEMESSAGE10 letters