Answer:

pipsqueak

Answer	Crossword Clue
PIPSQUEAK	Twerp
PIPSQUEAK	Squirt
PIPSQUEAK	Nonentity.

PIPSQUEAK	Insignificant one
PIPSQUEAK	Runt
PIPSQUEAK	Shrimp
PIPSQUEAK	Nobody

Crossword

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