Down with stick from eucalyptus tree (4,3)

I believe the answer is:

blue gum

'eucalyptus tree' is the definition.
(blue gum is a kind of eucalyptus tree)

'down with stick' is the wordplay.
'down' becomes 'blue' (I've seen this before).
'with' means one lot of letters go next to another.
'stick' becomes 'gum' (I've seen this before).
'blue'+'gum'='BLUE GUM'

'from' acts as a link.

I've seen this clue in The Independent.

Want a hint initially instead of a full solution? Install my app