At about four, again, there’s a great uproar (6)
I believe the answer is:
furore
'a great uproar' is the definition.
'furore' can be an answer for 'uproar' (synonyms). I am not sure about the 'a great' bit.
'at about four again' is the wordplay.
'at' is a charade indicator (letters next to each other).
'about' indicates anagramming the letters.
'again' becomes 're' (prefix meaning 'again').
'four' is an anagram of 'furo'.
'furo' next to 're' is 'FURORE'.
'there's' is the link.
Can you help me to learn more?
(Other definitions for furore that I've seen before include "An uproar, of admiration or anger" , "To-do" , "Commotion - public outburst - rage" , "A general uproar or noisy scene" , "'Uproar, brouhaha (6)'" .)