One expecting payment for horse (7)
I believe the answer is:
charger
This clue could be a double definition.
'one expecting payment' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'for horse' is the second definition.
(charger is a type of horse)
Can you help me to learn more?
(Other definitions for charger that I've seen before include "One loading" , "One asking money for" , "I expect payment" , "that would prevent loss of power?" , "Cavalry horse - used on battery" .)