Hike up fell - leave, as toe's oddly getting cut (7)
I believe the answer is:
elevate
'hike up' is the definition.
'fell leave as toe's oddly getting cut' is the wordplay.
'oddly getting cut' means one should take alternating letters.
'fell'+'leave'+'as'+'toes'='fellleaveastoes'
The alternate letters of 'fellleaveastoes' are 'ELEVATE'.
(Other definitions for elevate that I've seen before include "Raise to a higher position" , "Lift to higher place or position" , "Raise or lift" , "Improve morally" , "Uplift" .)