
1) City of Louisiana 2) City of the USA 3) City in North America 4) City of the Americas 5) City in the US 6) City of the US 7) City in the Americas 8) City in the USA 9) City in Louisiana 10) City in the United States 11) City of North America 12) City of the United States 13) Diesel engine manufacturer 
Found on 
https://www.crosswordclues.com/clue/ruston
 [engine builder]
[engine builder]  Ruston & Hornsby, later known as Ruston, was an industrial equipment manufacturer in Lincoln, England, the company`s history going back to 1840. The company is best known as a manufacturer of narrow and standard gauge diesel locomotives and also of steam shovels. Other products included cars, steam locomotives and a range o...
Found on 
http://en.wikipedia.org/wiki/Ruston_(engine_builder)
  No exact match found.