Italian workers united -- bad goings-on half concealed (6)
I believe the answer is:
tuscan
'italian' is the definition.
(someone from Tuscany in Italy)
'workers united bad goings-on half concealed' is the wordplay.
'workers united' becomes 'TU' (trade union).
'bad goings-on' becomes 'scandals' (bad behaviour).
'half concealed' indicates taking half.
'scandals' with half the letters taken is 'scan'.
'tu'+'scan'='TUSCAN'
(Other definitions for tuscan that I've seen before include "Person from Siena" , "Relating to a region of Italy" , "Classical architecture" , "Italian dialect spoken in Florence" , "From a region of west central Italy" .)