Climber in Australian Alps (5)
I believe the answer is:
liana
'climber' is the definition.
(thesaurus)
'in australian alps' is the wordplay.
'in' says the answer is hidden in the clue.
'LIANA' is hidden within 'australian alps'.
(Other definitions for liana that I've seen before include "Woody climbing tropical plant -- a nail (anag)" , "Climbing-plant" , "Tropical forest climber" , "climber in the tropics" , "Climbing jungle plant" .)