Grime in bath (8)
I believe the answer is:
tidemark
(Other definitions for tidemark that I've seen before include "shows extent of clean-up" , "Grimy ring left on bath" , "washing-line" , "coastline?" , "Grimy line round the inside of a bath" .)
I believe the answer is:
tidemark
(Other definitions for tidemark that I've seen before include "shows extent of clean-up" , "Grimy ring left on bath" , "washing-line" , "coastline?" , "Grimy line round the inside of a bath" .)