Daring caper ends with Aussie crook behind bars (5)
I believe the answer is:
grill
'crook behind bars' is the definition.
'grill' can be an answer for 'crook' (thesaurus). I'm not sure about the 'behind bars' bit.
'daring caper ends with aussie' is the wordplay.
'ends' indicates one should take the final letters.
'with' means one lot of letters go next to another.
'aussie' becomes 'ill' (I can't justify this - if you can you should give a lot more credence to this answer).
The last letters of 'daring caper' are 'gr'.
'gr'+'ill'='GRILL'
Can you help me to learn more?
(Other definitions for grill that I've seen before include "interrogation?" , "Seriously question" , "Question hard" , "Cooking device" , "Cook under direct heat" .)