Heartless boasting punished in disorderly house (6)
I believe the answer is:
bagnio
'disorderly house' is the definition.
(I've seen this before)
'heartless boasting punished' is the wordplay.
'heartless' suggests removing the centre.
'punished' is an anagram indicator.
'boasting' with its middle taken out is 'boaing'.
'boaing' with letters rearranged gives 'BAGNIO'.
'in' acts as a link.
(Other definitions for bagnio that I've seen before include "Bordello" , "disorderly house" .)