Basin (4)
'basin' is the definition.
(I know that basin can be written as sink)
This is all the clue.
(Other definitions for sink that I've seen before include "Drop N flag" , "Decline - in the kitchen" , "Scene of iniquity or washing up" , "Submerge; basin" , "something needed in kitchen" .)
'basin' is the definition.
(I know that basin can be written as bowl)
This is the entire clue.
(Other definitions for bowl that I've seen before include "Wood; basin" , "Deep dish or basin" , "hollow" , "See 20" , "Deliver - item of pottery" .)
'basin' is the definition.
(tidal basin is a kind of basin)
This is the entire clue.
(Other definitions for tidal that I've seen before include "Ebbing and flooding" , "(Of the sea) ebbing and flowing" , "To do with movement of seas" , "Of sea, rising and falling" , "Subject to moon's pull" .)