"Your point being . . .?" (3)
I believe the answer is:
and
'your point being?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for and that I've seen before include "& 18 You bet!" , "Word to connect" , "Together with" , "Joiner or dandies" , "Most-used conjunction in English" .)