Husband or wife (6)
I believe the answer is:
spouse
I believe this is a double definition.
'husband' is the first definition.
(I know that husband can be written as spouse)
'wife' is the second definition.
(I know that wife can be written as spouse)
(Other definitions for spouse that I've seen before include "Partner in marriage" , "Consort" , "Other half" , "old lady?" , "Husband or wife" .)