Gunpowder component (9)
There are a few possibilities for this:
saltpeter
'gunpowder component' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nitre that I've seen before include "Gunpowder ingredient" , "safeguard against decay" , "A part of fertilizer" , "Sodium nitrate" , "constituent of gunpowder" .)
'gunpowder component' is the definition.
(I've seen this in another clue)
This is the entire clue.