Provides refreshment as serving staff ignore one (6)
I believe the answer is:
waters
'one' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for waters that I've seen before include "(Of the mouth) salivates" , "floods" , "Muddy - - (blues singer)" , "What may be taken at a spa" , "Sprinkles" .)