Not able to talk about current moment (6)
I believe the answer is:
minute
'moment' is the definition.
(synonyms)
'not able to talk about current' is the wordplay.
I cannot really understand how this works, but
'current' could be 'in' (I've seen this in other clues) and 'in' is present in the answer.
The remaining letters 'mute' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for minute that I've seen before include "Immeasurably small" , "Little -- 60 18 across" , "Occupying very little space" , "60s" , "Tiny; written note" .)