The point in these puzzles is to start a fight (5,6)
I believe the answer is:
cross swords
'a fight' is the definition.
(I've seen this before)
'the point in these puzzles' is the wordplay.
'the point' becomes 'S' (S is an example).
'in' indicates putting letters inside.
'these puzzles' becomes 'crosswords' (crossword is a type of puzzle).
's' put inside 'crosswords' is 'CROSS SWORDS'.
'is to start' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for cross swords that I've seen before include "fight" , "24 [WAR]" , "quarrel" , "puzzles like this" , "start the duelling" .)