You could also try this:
typedef struct {
char a;
char b;
} tes;
typedef struct {
char t;
tes e;
} tte;
void setup(){
}
void loop()
{
tte SSte = {0,{1,0}}; //Initialise the new variable - I think this may be a gcc extension?
if (SSte.e.a)
{
delay(10);
}
}