Fittingly adapted play about the outback (5)
I believe the answer is:
aptly
'fittingly' is the definition.
(I've seen this before)
'adapted play about the outback' is the wordplay.
'adapted' indicates anagramming the letters.
'about' is an insertion indicator.
'the outback' becomes 't' (I can't explain this - if you can you should give a lot more credence to this answer).
'play' with letters rearranged gives 'aply'.
'aply' enclosing 't' is 'APTLY'.
Can you help me to learn more?
(Other definitions for aptly that I've seen before include "In suitable fashion" , "as is fitting" , "Suitably" , "In suitable form" , "In an appropriate way" .)