Prophet from Australia upset critic? (9)
I believe the answer is:
zoroaster
'prophet' is the definition.
(Zoroaster is an example)
'australia upset critic?' is the wordplay.
'australia' becomes 'oz' (informal name for Australia).
'upset' shows that the letters should be reversed in order.
'critic?' becomes 'roaster' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'oz' back-to-front is 'zo'.
'zo'+'roaster'='ZOROASTER'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for zoroaster that I've seen before include "Persian prophet" , "Religious leader" .)