Answer:

anit

Answer	Crossword Clue
ANIT	Have ... to pick
ANIT	Pick ... (pettifog)
ANIT	Pick ... (quibble)

ANIT	Have -- to pick
ANIT	Pick -- (cavil)
ANIT	Pick ... (fault-find)

Crossword

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