Material set on fire by husband (9)
I believe the answer is:
sackcloth
'material' is the definition.
(I know that sackcloth is a type of material)
'set on fire by husband' is the wordplay.
I cannot really see how this works, but
'set' could be 'clot' (I've seen this in another clue) and 'clot' is located in the answer.
'fire' could be 'sack' (dismiss someone from their job) and 'sack' is found within the answer.
'husband' could be 'h' (abbreviation) and 'h' is found within the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sackcloth that I've seen before include "Penitential fabric associated with ashes" , "Penitent's attire" , "coarse material" , "Old garment" , "Penitent's garb" .)