Final Club Tropicana attraction going "Boom" (4)
I believe the answer is:
bang
'boom' is the definition.
(thesaurus)
'final club tropicana attraction going' is the wordplay.
'final' suggests the final letters.
The last letters of 'club tropicana attraction going' are 'BANG'.
(Other definitions for bang that I've seen before include "Sudden noise; fringe" , "Completely modern" , "A loud report or a collision" , "Explosive noise" , "Hairstyle" .)