Include Aussie oaf in one's farce (7)
I believe the answer is:
mockery
'farce' is the definition.
(thesaurus)
'include aussie oaf in one's' is the wordplay.
I cannot really see how this works, but
'aussie' could be 'ocker' (I have seen 'oafish Aussie' mean 'ocker' so perhaps 'aussie' could also mean 'ocker') and 'ocker' is found in the answer.
The remaining letters 'my' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for mockery that I've seen before include "Derision" , "Ridicule" , "Travesty" .)