Answer:

hyphen

Answer	Crossword Clue
HYPHEN	Wi-fi connection?
HYPHEN	Mark in some surnames
HYPHEN	E-mail connection?

HYPHEN	Big-time connection?
HYPHEN	-
HYPHEN	Character in "Scooby-Doo"?
HYPHEN	Wi-Fi connection?
HYPHEN	Dash
HYPHEN	Word connector
HYPHEN	Connecting mark
HYPHEN	Character in "Ben-Hur"?

HYPHEN	Surname punctuation
HYPHEN	Punctuation in "patty-cake"
HYPHEN	Top-row key
HYPHEN	Punctuation mark.
HYPHEN	Well-known mark
HYPHEN	Punctuation mark
HYPHEN	Kin of a dash
HYPHEN	Jack-in-the-box part

HYPHEN	Certain punctuation mark
HYPHEN	It's under an underscore
HYPHEN	One of two in a jack-o'-lantern?

Crossword

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