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' says to put 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" .)