Meaning there's no difference between gin and tonic? (4)
I believe the answer is:
gist
'meaning' is the definition.
(gist is a kind of meaning)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for gist that I've seen before include "Essential point or meaning of, say, the matter" , "Basic meaning" , "Core meaning" , "The substance of a text" , "Meat" .)