Sausage exploded over traitor and wife (9)
I believe the answer is:
bratwurst
'sausage' is the definition.
(bratwurst is a kind of sausage)
'exploded over traitor and wife' is the wordplay.
'exploded' becomes 'burst' (I've seen this in another clue).
'over' means one lot of letters goes inside another.
'traitor' becomes 'rat' (I've seen this before).
'and' says to put letters next to each other.
'wife' becomes 'w' (abbreviation).
'rat'+'w'='ratw'
'burst' placed around 'ratw' is 'BRATWURST'.
(Other definitions for bratwurst that I've seen before include "German pork sausage" , "banger" , "Type of German sausage" , "German port sausage" .)