In relation to (3-1-3)
I believe the answer is:
vis-a-vis
'in relation to' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for vis-a-vis that I've seen before include "Face-to-face" , "Facing; in relation to" , "In relation to, as compared with" , "With regard to" .)