Primate published article about diversity mainly (5-4)
I believe the answer is:
orang-utan
'primate' is the definition.
(I've seen this before)
'published article about diversity mainly' is the wordplay.
'published' becomes 'out' (I've seen this in another clue).
'article' becomes 'an' (indefinite article).
'about' means one lot of letters goes inside another.
'diversity mainly' becomes 'rang' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'out'+'an'='outan'
'outan' placed around 'rang' is 'ORANG-UTAN'.
Can you help me to learn more?
(Other definitions for orang-utan that I've seen before include "Great ape" , "11 across" , "Endangered ape" , "Anthropoid mammal of Indonesia" , "Species of ape" .)