Element of jazz in club (4)
I believe the answer is:
zinc
'element' is the definition.
(zinc is a kind of element)
'of jazz in club' is the wordplay.
'of' indicates a hidden word.
'ZINC' is hidden in the letters of 'jazz in club'.
(Other definitions for zinc that I've seen before include "Mineral" , "Galvanizing metal" , "Metallic element present with copper in brass" , "Blusish-white lustrous metallic element" , "coat for protection" .)