Am following the rest: off to get water (6)
I believe the answer is:
stream
'water' is the definition.
(I know that stream is a type of water)
'am following the rest off' is the wordplay.
'following' is a charade indicator (letters next to each other).
'off' indicates an anagram.
'rest' with letters rearranged gives 'stre'.
'am' put after 'stre' is 'STREAM'.
'to get' is the link.
(Other definitions for stream that I've seen before include "Flow from master" , "Moving water" , "pupils pour out" , "group of schoolchildren" , "play in real time" .)