Hits I established hosting chill-out session at The Haçienda? (6)
I believe the answer is:
siesta
'chill-out session at the hacienda?' is the definition.
(type of sleep in Spain)
'hits i established hosting' is the wordplay.
'hosting' says the answer is hidden in the clue (I've seen 'hosts' mean this).
'SIESTA' can be found hidden inside 'hits i established'.
(Other definitions for siesta that I've seen before include "Diurnal nap in Spain" , "PM snooze" , "Afternoon nap in a warm climate" , "Afternoon rest" , "An afternoon nap in Spain" .)