It holds its fire (7)
I believe the answer is:
cresset
'it holds its fire' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for cresset that I've seen before include "Old torch" , "Old form of illumination" , "Strange secrets of the beacon" , "Fuel container" , "Flaming torch" .)