The most common and most likely answer to this crossword clue is the 8 letter word CONTENDS
I've seen this crossword clue in The Daily Telegraph
C
O
N
T
E
N
D
S
More clues leading to the result CONTENDS
Buddy explains!
The straight part
We know that "Argues" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case argues = contends.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 CONTENDS mean?
CONTENDS verb- To strive in opposition; to contest; to dispute; to vie; to quarrel; to fight.
- To struggle or exert oneself to obtain or retain possession of, or to defend.
- To strive in debate; to engage in discussion; to dispute; to argue.
- To believe (something is reasonable) and argue (for it); to advocate.