White lies? Seemingly not! (2,4,7)
I believe the answer is:
in vino veritas
'white lies?' is the definition.
The definition suggests a singular noun which matches the answer.
'seemingly not' is the wordplay.
I cannot really understand how this works, but
'not' could be 'no' (negative) and 'no' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for in vino veritas that I've seen before include "something about tavern talk?" , "Alcohol induces truth" , "A person tells the truth when drunk" , "Cabra ride will reach the barrier" .)