Word connector (6)
I believe the answer is:
hyphen
'word connector' 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 "A horizontal words-joiner" , "Line in a double-barrelled name, say" , "Dash joining words" , "Stroke between syllables or words" , "Word-joining mark" .)