Policy of non-interference (7-5)
I believe the answer is:
laissez-faire
'policy of non-interference' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for laissez-faire that I've seen before include "not getting involved" , "Doctrine that governments should not interfere in commercial matters" , "Practice of non-interference" , "Policy of non-interference" .)