Following moment (6)
I believe the answer is:
second
I believe this clue is a double definition.
'following' is the first definition.
(thesaurus)
'moment' is the second definition.
(I know that moment can be written as second)
(Other definitions for second that I've seen before include "jiffy" , "Unit of time - after No 1" , "Brief moment" , "Attendant in a duel or boxing match" , "Mo" .)