First female's right, always (4)
I believe the answer is:
ever
'always' is the definition.
('ever' can be a synonym of 'always')
'first female's right' is the wordplay.
'first' says to put letters next to each other.
'female' becomes 'eve' (Eve is an example**).
'right' becomes 'r' (common abbreviation).
'eve'+'r' is 'EVER'.
(Other definitions for ever that I've seen before include "constantly" , "Always, at any time" , "On any occasion" , "Possibly" , "Continually" .)