The carnival produces a lot of sound (4)
I believe the answer is:
fete
'the carnival' is the definition.
(thesaurus)
'lot of sound' is the wordplay.
'lot' becomes 'fate' (synonyms).
'of sound' indicates a 'sounds like' (homophone) clue (I've seen 'sounding' mean this).
'fate' sounds like 'FETE'.
'produces a' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for fete that I've seen before include "Festival; gala" , "Outdoor gala" , "Fund-raising function; festival" , "Organised outdoor party or charitable event" , "Outdoor charity function" .)