Conjugal (7)
(Other definitions for marital that I've seen before include "Referring to a union" , "describing matrimony" , "alliance" , "related to union" , "Maybe husband's" .)
'conjugal' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for nuptial that I've seen before include "Like wedding ceremony" , "To do with marriage or a wedding ceremony" , "Relating to marriage" , "Until pa (anag.)" , "Relating to matrimony" .)