Crossword Genius

Lines of argument? (4)

Ross

I believe the answer is:

rows

I'm a little stuck... Click here to teach me more about this clue!

'lines' is the definition.
(I know this)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for rows that I've seen before include "Columns" , "Quarrels; ranks" , "Arguments" , "Propels into quarrels?" , "emotional exchanges" .)

I've seen this clue in The Globe and Mail.
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