Inept type engaging a black Aussie native (7)
I believe the answer is:
wallaby
'aussie native' is the definition.
(animal native to Australia)
'inept type engaging a black' is the wordplay.
'inept type' becomes 'wally' (term for a stupid or inept person).
'engaging' is an insertion indicator.
'black' becomes 'b' (as in pencil classifications).
'a'+'b'='ab'
'wally' enclosing 'ab' is 'WALLABY'.
(Other definitions for wallaby that I've seen before include "Small marsupial" , "jumper" , "One like small kangaroo" , "Bounder" , "Kangaroo-like creature" .)