Filed from 6 published puzzles

KIDDO

Set to 4 different clues across 6 published puzzles, most often “Pal” — The New York Times, Monday, 3 September 2007.

5 letters

Every clue on record, most used first

Pal2 times
The New York Times — Monday, 3 September 2007
Friendly term of address2 times
The New York Times — Thursday, 26 February 2004
Buddyonce
The New York Times — Thursday, 8 February 2001
Familiar term of addressonce
The New York Times — Thursday, 12 March 1998

Other answers to these clues

ACE3 letters
AMIGO5 letters
BEA3 letters
BRO3 letters
BUB3 letters
BUCKO5 letters
BUDDY5 letters
CHUM4 letters
GAL3 letters
MAC3 letters
MATE4 letters
MISTER6 letters