A track made by mountaineers (6)
I believe the answer is:
ascent
'a track made by mountaineers' is the definition.
I can't judge whether this definition defines the answer.
'a track made by' is the wordplay.
'track' becomes 'scent' (both can mean a trace left by someone).
'made by' is a charade indicator (letters next to each other) (letters written or made by another set of letters).
'a'+'scent'='ASCENT'
Can you help me to learn more?
(Other definitions for ascent that I've seen before include "Going up" , "made by Hilary and Tenzing" , "Act of moving upwards" , "A rise in status; climb" , "Upward movement" .)