Wanders freely in mountains (6)
I believe the answer is:
ranges
This clue could be a double definition.
'wanders freely' is the first definition.
'ranges' can be an answer for 'wanders' ('range' can be a synonym of 'wander'). I am unsure of the 'freely' bit.
'mountains' is the second definition.
(mountain ranges)
'in' acts as a link.
Can you help me to learn more?
(Other definitions for ranges that I've seen before include "rows" , "Old cooking appliances" , "Kitchen appliances and large, grassy tracts" , "Chains of mountains" , "Areas for target practice" .)