Beautiful female, wife with one good hairpiece (7)
I believe the answer is:
periwig
'hairpiece' is the definition.
(periwig is a kind of hairpiece)
'beautiful female wife with one good' is the wordplay.
'beautiful female' becomes 'peri' (peri is a kind of female. I am not sure about the 'beautiful' bit.**).
'wife' becomes 'w'.
'with' says to put letters next to each other.
'one' becomes 'i' (Roman numeral).
'good' becomes 'g' (abbreviation).
'peri'+'w'+'i'+'g'='PERIWIG'
Can you help me to learn more?
(Other definitions for periwig that I've seen before include "topping" , "Old kind of toupee" , "Locks" , "judicial cover" , "Peruke" .)