Decoration Englishman in Australia is given twice (3-3)
I believe the answer is:
pom-pom
'decoration' is the definition.
'englishman in australia is given twice' is the wordplay.
'englishman in australia' becomes 'pom' (I've seen this before).
'is given twice' becomes 'pom' (I can't explain this - if you can you should believe this answer much more).
'pom'+'pom'='POM-POM'
Can you help me to learn more?
(Other definitions for pom-pom that I've seen before include "Anti-aircraft cannon - woolly ball" , "Decorative tuft or ball - mop up twice" , "Decorative tuft on shoes etc." , "Ball of ornamental tuft, for cheerleaders perhaps" , "Quick-firing anti-aircraft gun; decoration in the form of a ball" .)