Publicly known in just less than one minute (2,6)
I believe the answer is:
on record
'publicly known' is the definition.
(I've seen this before)
'less than one minute' is the wordplay.
'less than' means to remove the last letter (not the full word).
'minute' becomes 'record' (e.g. during a meeting).
'one' with its last letter removed is 'on'.
'on'+'record'='ON RECORD'
'in just' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for on record that I've seen before include "officially acknowledged" , "Publicly known - stated in published document" , "Officially recognised" , "Officially noted" , "where needles used to be put" .)