
1) Tree for a hungry koala
Found on
https://www.crosswordclues.com/clue/ironbark

Ironbark is a common name of a number of species in three taxonomic groups within the genus Eucalyptus that have dark, deeply furrowed bark. Instead of being shed annually as in many of the other species of Eucalyptus, the dead bark accumulates on the trees, forming the fissures. It becomes rough after drying out and becomes impregnated with kino,...
Found on
http://en.wikipedia.org/wiki/Ironbark

(Eucalyptus) This group consists of more than 400, quick-growing, tender, evergreen trees and some shrubs native to Tasmania and Australia. These unique trees can grow to giganticproportions; some species can reach heights over 400 feet in their native habitats and up to 200 feet in California. Eucalyptus trees, also popularly known as Gum trees be...
Found on
http://www.encyclo.co.uk/local/10004

any of the various Australian eucalyptuses having a hard, solid bark.
Found on
https://www.infoplease.com/dictionary/ironbark
No exact match found.