Fire remnant (3)
'fire remnant' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ember that I've seen before include "Glowing coal; prayer (Days)" , "Glowing remainder of a fire" , "Still smouldering fragment of wood or coal" , "Material in dying fire" , "Hot piece of wood or coal from a fire" .)
'fire remnant' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ash that I've seen before include "-- Wednesday" , "Part of forest" , "End of fire" , "Hard pale wood" , "deposit" .)