
1) Railroad switching track
Found on
https://www.crosswordclues.com/clue/xover

XOVER is a Network News Transfer Protocol (NNTP) command used to return information from an news server`s overview (NOV) database. The XOVER command is documented in RFC 2980, a specification for Common NNTP Extensions authored by Stan O. Barber in October 2000. A newer version of NNTP, specified in RFC 3977, formalized the XOVER extension with n....
Found on
http://en.wikipedia.org/wiki/XOVER

Xover is an English-language environment magazine owned by `BCIL Alt. Tech. Foundation` and edited in Bangalore. In January 2004, India`s Environment Magazine, Xover, was started for discerning readers. The magazine remains a serious passion for the editor and his small team as of February 2008 with a modest print edition circulation of 5000 (u......
Found on
http://en.wikipedia.org/wiki/Xover

crossover
Found on
http://www.noslang.com/dictionary/x/
No exact match found.