Floozy wraps husband and wife in foil (6)
I believe the answer is:
thwart
'foil' is the definition.
('thwart' can be a synonym of 'foil')
'floozy wraps husband and wife' is the wordplay.
'floozy' becomes 'tart'.
'wraps' indicates putting letters inside.
'husband' becomes 'h'.
'and' is a charade indicator (letters next to each other).
'wife' becomes 'w'.
'h'+'w'='hw'
'tart' placed around 'hw' is 'THWART'.
'in' is the link.
(Other definitions for thwart that I've seen before include "Frustrate and obstruct" , "Prevent from accomplishing something" , "Frustrate or foil" , "Hinder or prevent" , "seat for oarsman" .)