Pour from this running water through milk dispenser (6)
I believe the answer is:
teapot
'pour from this' is the definition.
(tea is poured from a teapot)
'running water through milk dispenser' is the wordplay.
'running water' becomes 'Po' (Italian river).
'through' indicates putting letters inside (inserted letters go through the word).
'milk dispenser' becomes 'teat' (nipple of an animal).
'po' placed into 'teat' is 'TEAPOT'.
(Other definitions for teapot that I've seen before include "Hot drink dispenser" , "Kitchen vessel with handle, lid and spout" , "Container for a brew" , "What mother perhaps holds" , "Tao pet (anag)" .)