### Clue: Bravery of girl soldier captured in Lowell's opening lines (9)
### Answer: GALLANTRY 
 ### Explanation: Definition: Bravery
 GAL(girl) + ANT(a caste of whose insect society is the soldier) **contained in**(captured in) [**1st letter of**(…'s opening) "Lowell" + RY(abbrev. for "railway"/system of train lines/tracks)].