The most common and most likely answer to this crossword clue is the 6 letter word CONCUR
C
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N
C
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More clues leading to the result CONCUR
- Agree to study dog
- Agree Conservative needs to meet unpleasant guy
- Agree to study remedy briefly
- Go along with scam by scoundrel
- Trickster and scoundrel are in agreement
- Agree to deceive copper, right
- Prisoner and scoundrel agree
- Agree with critical description of Tory!
- Agree as one opposing scoundrel
- Agree with right-wing scoundrel
Buddy explains!

The straight part
We know that "to run together" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case to run together = concur.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 CONCUR mean?
CONCUR verb- To unite or agree (in action or opinion); to have a common opinion; to coincide; to correspond.
- To meet in the same point; to combine or conjoin; to contribute or help towards a common object or effect.
- To run together; to meet.
- To converge.