The water jump (6)
I believe the answer is:
spring
I believe this is a double definition.
'the water' is the first definition.
(spring water is a kind of water)
'jump' is the second definition.
(synonyms)
(Other definitions for spring that I've seen before include "Spa" , "The bouncy season" , "Surrey supporter?" , "Leap at a well-head" , "The vernal season" .)