Container for writing fluid in the kitchen sink? Well, I never! (7)
I believe the answer is:
inkwell
'container for writing fluid' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for inkwell that I've seen before include "source for old-fashioned writer" , "It holds writing fluid" , "Old school desk feature" , "Reservoir for writing fluid" , "Desk reservoir" .)