If you have two header files clashing, this can be a hard problem.
A possible fix is
#include <first file>
#undef USB_REQ_GET_STATUS
#include <second file>
But if your includes are clashing over a name as specific as that - it may be that they are trying to do the same job and are necessarily going to step on each other's toes.
An alternative fix would be to break your sketch up into separate .cpp files, and have each of those only pull in the includes that it needs to do its job.