Means of removing liquid from crushed gardenia (8)
I believe the answer is:
drainage
'means of removing liquid' is the definition.
(process of draining)
'crushed gardenia' is the wordplay.
'crushed' indicates anagramming the letters.
'gardenia' with letters rearranged gives 'DRAINAGE'.
'from' acts as a link.
(Other definitions for drainage that I've seen before include "System for removing liquid" , "Disposal of waste water" , "Removal of waste water" , "Means of removing water" , "Evacuation -- gardenia (anag)" .)