Eucalyptus (3,4)
I believe the answer is:
gum tree
'eucalyptus' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for gum tree that I've seen before include "Up here's problematic" , "you don't want to climb!" , "in a difficult situation" , "Up a - -, in a predicament" , "Awkward place to be" .)