Wi-fi connection? (6)
I believe the answer is:
hyphen
'wi-fi connection?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hyphen that I've seen before include "Punctuation mark separating words" , "Mark joining two words" , "Stroke between syllables or words" , "Horizontal words joiner" , "Mark between parts of a compound word" .)