Fay and Kerry's speech is fraudulent (6)
I believe the answer is:
fakery
'fay' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?
'kerry's speech is fraudulent' is the wordplay.
I cannot really see how this works, but
'fraudulent' could be 'fake' (I've seen this in another clue) and 'fake' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'and' acts as a link.
Can you help me to learn more?
(Another definition for fakery that I've seen is " Counterfeiting activity".)