Nowhere near being unapproachable (6)
I believe the answer is:
remote
'unapproachable' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for remote that I've seen before include "Miles away" , "Distant, aloof" , "as from armchair to TV?" , "Unlikely" , "Far way like meteor" .)