Struggle (with) (7)
I believe the answer is:
grapple
'struggle with' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for grapple that I've seen before include "Attempt to get hold of, or seize" , "Engage in close fighting" , "Fight hand-to-hand" , "Engage closely with" , "Go to work on" .)