Perhaps Tarzan wants one to be a passing acquaintance of Simple Simon (6)
I believe the answer is:
apeman
'perhaps tarzan' is the definition.
'one to be a passing acquaintance of simple simon' is the wordplay.
I cannot really see how this works, but
'one' could be 'an' (I've seen this in other clues) and 'an' is found in the answer.
'a' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'wants' is the link.
(Other definitions for apeman that I've seen before include "song by 4 [THE KINKS]" , "One of our extinct ancestors?" , "Extinct primate" , "Tarzan, for example" , "Long extinct human ancestor" .)