### Clue: Soldier's prompt resistance brings someone to get us out of trouble (7)
### Answer: RESCUER 
 ### Explanation: Definition: someone to get us out of trouble
 RE(abbrev. for a Royal Engineer, a soldier in the engineering branch of the military) + CUE(a prompt/a signal to indicate to, say, actors or performers to start their performance, speech, etc.) + R(symbol for electrical resistance in physics).