el(evated railroad) is US slang for a railway.
S(team)S(hip) is an abbreviation that crops up a lot in crosswords.
If you don't have a copy of Chambers Dictionary (not the shorter versions) then you would be well advised to buy one. Crossword setters tend to use every single abbreviation in there, for example 'see' in a clue could be 'lo' or, occasionally, 'v', short for 'vide'.
One last thing - you are allowed to start a new thread, at no extra cost!!