You and me perhaps in favour of sisters getting nothing (8)
I believe the answer is:
pronouns
'you and me' is the definition.
(I've seen this in another clue)
'in favour of sisters getting nothing' is the wordplay.
'in favour of' becomes 'pro' (being pro a particular cause).
'sisters' becomes 'nuns' (I've seen this before).
'getting' is an insertion indicator.
'nothing' becomes 'O' (O resembles 0).
'nuns' going around 'o' is 'nouns'.
'pro'+'nouns'='PRONOUNS'
'perhaps' acts as a link.
(Other definitions for pronouns that I've seen before include "Words in place of persons, places or things" , "They stand instead of 26ac" , "Parts of speech -- poor nuns (anag)" .)