Soldier feeds nothing to fiery monster (7)
I believe the answer is:
dragoon
'soldier' is the definition.
(I know that dragoon is a type of Trooper)
'feeds nothing to fiery monster' is the wordplay.
I cannot really see how this works, but
'nothing' could be 'o' (looks like zero - 0) and 'o' is located in the answer.
'monster' could be 'dragon' (dragon is a kind of monster) and 'dragon' is found in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for dragoon that I've seen before include "Former heavily armed cavalryman" , "Force" , "Press" , "Shanghai" , "bully" .)