Precise moment (6)
I believe the answer is:
minute
I believe this is a double definition.
'precise' is the first definition.
(I've seen this before)
'moment' is the second definition.
(synonyms)
(Other definitions for minute that I've seen before include "A few ticks" , "Tiny; period of time" , "Really very small, like a period of time" , "Very short or tiny" , "Brief jotting" .)