Missing the point, perhaps, of inside information (3-3)
I believe the answer is:
tip-off
'inside information' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for tip-off that I've seen before include "Give a secret warning" , "Give advance warning or hint" , "Alert" , "Warn in advance" , "Warn helpfully" .)