Swindle revealed by German woman and daughter (5)
I believe the answer is:
fraud
'swindle' is the definition.
(I've seen this in another clue)
'german woman and daughter' is the wordplay.
'german woman' becomes 'frau' (German equivalent to Mrs).
'and' is a charade indicator (letters next to each other).
'daughter' becomes 'd' (genealogical abbreviation).
'frau'+'d'='FRAUD'
'revealed by' is the link.
(Other definitions for fraud that I've seen before include "Fiddle" , "Cheat" , "Charlatan" , "Deceit, especially financial" , "Criminal deception" .)