Restart argument, overcome by slight (5-2)
I believe the answer is:
throw-in
'restart argument overcome by slight' is the definition.
I can't judge whether this definition defines the answer.
'argument overcome by slight' is the wordplay.
'argument' becomes 'row' (to row is to argue).
'overcome by' means one lot of letters goes inside another.
'slight' becomes 'thin' (similar in meaning).
'row' going into 'thin' is 'THROW-IN'.
Can you help me to learn more?
(Other definitions for throw-in that I've seen before include "It happens after the ball goes into touch" , "Act of restarting play after football has gone into touch" , "Add free; return (ball) to play" , "set piece" , "Soccer/rugby move" .)