No, there is no way (in ANSI, anyway) to include a preprocessor command
in a macro; it is explicit that, even if the sequence of tokens resulting
from a macro expansion looks like a preprocessor command, it isn't.

The reason yours doesn't work is that \[newline] sequences are eaten long
before the preprocessor gets there, so it's precisely equivalent to
# define ID(s) #ident s

-s