The most common and most likely answer to this crossword clue is the 6 letter word HYPHEN
I've seen this crossword clue in The Daily Telegraph
H
Y
P
H
E
N
More clues leading to the result HYPHEN
- Wi-Fi connection?
- Essentially upper-class, Harry wants a car with extremely posh English name
- Priest under extremely heavy layer makes short dash
- Dash to get publicity round hotel by noon
- A little-known connection?
- Line some still use in email and voicemail
- Dash among day-trippers
- It helps to make 25 foul, we hear, after intensive publicity’s curtailed?
- Sign, joining part of co-operative
- A line of language?
Buddy explains!
The straight part
We know that "A line of language" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a line of language = hyphen.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does HYPHEN mean?
HYPHEN noun- The symbol "‐", typically used to join two or more words to form a compound term, or to indicate that a word has been split at the end of a line.
- Something that links two more consequential things.
- An enclosed walkway or passage that connects two buildings.
- Someone who belongs to a marginalized subgroup, and can therefore described by a hyphenated term, such as "German-American", "female-academic", etc.
- To separate or punctuate with a hyphen; to hyphenate.
- Used to emphasize the coordinating function usually indicated by the punctuation "-".