A woman's right, as always (4)
I believe the answer is:
ever
'as always' is the definition.
(I've seen this before)
'a woman's right' is the wordplay.
'a woman' becomes 'eve' (Eve is an example**).
'right' becomes 'r' (common abbreviation).
'eve'+'r'='EVER'
(Other definitions for ever that I've seen before include "Continually" , "On any occasion" , "In perpetuity" , "Eternity" , "Continuously" .)