Answer:

linesmen

Answer	Crossword Clue
LINESMEN	They assist referees
LINESMEN	Some grid officials
LINESMEN	Tennis officials

LINESMEN	Football officials.
LINESMEN	Telephone workmen.
LINESMEN	Tennis officials.
LINESMEN	Wimbledon official

Crossword

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