Correct point of view at one corner of the square (5,5)
I believe the answer is:
right angle
'one corner of the square' is the definition.
(I've seen this before)
'correct point of view' is the wordplay.
'correct' becomes 'right' (right can mean correct).
'point of view' becomes 'angle' (as in a journalist's angle on a story).
'right'+'angle'='RIGHT-ANGLE'
'at' acts as a link.
(Other definitions for right angle that I've seen before include "Ninety-degree corner" , "Ninety degrees" , "Part of a square" , "corner of the square" , "that's formed by 1 Across and Down" .)