Answer:

tarter

Answer	Crossword Clue
TARTER	Not as sweet, maybe
TARTER	Sharper-tasting
TARTER	Comparatively caustic

TARTER	More lemony
TARTER	More like lemons
TARTER	More acidulous.
TARTER	Sharper tasting.
TARTER	More sour
TARTER	More acidulous
TARTER	More snappish
TARTER	More sharp

TARTER	With a sharper taste
TARTER	More tangy
TARTER	More caustic

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.