Union (8)
'union' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for marriage that I've seen before include "Wedding" , "Formal union" , "Wedlock of alliance" , "Church occasion" , ""Till death do us part" arrangement" .)
'union' is the definition.
(I know that alliance is a type of coalition)
This is all the clue.
(Other definitions for alliance that I've seen before include "Kind of partnership with canaille" , "Bond" , "Federation" , "The joining by political agreement or treaty" , "Marriage - union" .)
'union' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for bond that I've seen before include "Fellow feeling" , "Luxury shopping area in central London" , "Link based on kinship, marriage or common interest" , "secure?" , "Contract" .)