Someone using tap - or what's needed in it? (6)
I believe the answer is:
washer
'someone' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I can't explain the rest of the clue.
(Other definitions for washer that I've seen before include "Cleaner" , "Seal to prevent leakage" , "Baptist" , "Seal preventing leakage" , "Metal ring - cleans clothes" .)