Falls back in war against powerful enemies (7)
I believe the answer is:
niagara
'falls' is the definition.
(Niagara Falls)
'back in war against powerful enemies' is the wordplay.
'NIAGARA' is hidden backwards in amongst the letters.
But, I am unsure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for niagara that I've seen before include "N. American waterfall" , "River flowing from Lake Erie into Lake Ontario" , "North American waterfalls" , "US/Canadian falls" , "N American river and Falls" .)