5 down
Hiker
told
about
covering
arduous
walk
(4)
Hiker told about covering arduous walk (4)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
Look at arduous walk — that's what you're after. Now, "about" is your reversal signal, so dig into "hiKER Told" and read those hidden letters backwards, and there it is.