Argue son needs to get into puzzles (5,6)

I believe the answer is:

cross swords

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

This clue might be a double definition.

'argue son needs' is the first definition.
'cross swords' can be an answer for 'argue' (thesaurus). I'm not sure about the 'son needs' bit.

'puzzles' is the second definition.
(I've seen this before)

'to get into' is the link.

Can you help me to learn more?

(Other definitions for cross swords that I've seen before include "24 [WAR]" , "puzzles like this" , "quarrel" , "Have a disagreement" , "fight" .)

I've seen this clue in The Telegraph.

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