Sap the spirit (5)
I believe the answer is:
juice
I believe this is a double definition.
'sap' is the first definition.
(I've seen this before)
'the spirit' is the second definition.
(thesaurus)
(Other definitions for juice that I've seen before include "Sap; petrol" , "Energy" , "Vitality" , "Fruit extract" , "fuel" .)