Filed from 3 published puzzles

BOOSTS

Set to 3 different clues across 3 published puzzles, most often “Gives a leg up” — The New York Times, Tuesday, 10 August 2010.

6 letters

Every clue on record, most used first

Gives a leg uponce
The New York Times — Tuesday, 10 August 2010
Promotesonce
The New York Times — Sunday, 1 January 1995
Increasesonce
The New York Times — Saturday, 10 December 1994

Other answers to these clues

ADDSTO6 letters
EXPANDS7 letters
FOSTERS7 letters
HELPS5 letters
PLUGS5 letters
SELLS5 letters
STEPSUP7 letters
STRESSES8 letters
SWELLS6 letters
TALKSUP7 letters
UPS3 letters