Hypocrisy? There's no such word! (4)
I believe the answer is:
cant
'hypocrisy?' is the definition.
(I've seen this before)
'no such word' is the wordplay.
I cannot really understand how this works, but
'no' could be 'n' (common abbreviation) and 'n' is located in the answer.
The remaining letters 'cat' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'there's' acts as a link.
Can you help me to learn more?
(Other definitions for cant that I've seen before include "Pious platitudes -- jargon" , "Affected talk" , "Inclination" , "List" , "Hypocritical talk; slope" .)