Tend to slope (7)
I believe the answer is:
This clue is a double definition.
'tend' is the first definition.
'slope' is the second definition.
(I know that slope can be written as incline)
'to' is the link.
(Other definitions for incline that I've seen before include "Have tendency or slope", "Bend forwards", "bow", "Lean (towards)", "prejudice".)