Zip-line at resort? That’s beside the point (10)
I believe the answer is:
tangential
'beside the point' is the definition.
I can't tell whether this definition defines the answer.
'zip-line at resort?' is the wordplay.
'zip' becomes 'tang' (I've seen this in another clue).
'resort?' indicates an anagram (I've seen 'resort' mean this).
'line'+'at'='lineat'
'lineat' with letters rearranged gives 'ential'.
'tang'+'ential'='TANGENTIAL'
'that's' is the link.
Can you help me to learn more?
(Other definitions for tangential that I've seen before include "Peripheral" , "Irrelevant" .)