Rely (on) (6)
![Ross](/clue/static/ross-mug.min.png)
(Other definitions for depend that I've seen before include "Hang down or be connected to something" , "Bank" , "Count on or hang from" , "Rely or hang on" , "Trust confidently, rely on" .)
(Other definitions for trust that I've seen before include "responsibility" , "Unit of NHS organisation" , "Have faith in, regard as reliable" , "Faith; care" , "commercial credit" .)