Partisan reviewed prospective member? (8)
I believe the answer is:
aspirant
'prospective member?' is the definition.
(someone aspiring to achieve a certain position)
'partisan reviewed' is the wordplay.
'reviewed' indicates an anagram (letters reviewed or revised).
'partisan' is an anagram of 'ASPIRANT'.
(Other definitions for aspirant that I've seen before include "One works hard to get to a higher position" , "One seeking eg promotion" , "Hopeful, wannabe" , "One hoping for success" , "One works hard to achieve something" .)