That was an interesting expedition. I'm pretty confident I've got to the right destination, but still have a residual niggle, that 15 across seems to have no definition. I initially took its first word, plus a missing letter, as the definition, despite the rubric's saying they occcurred only in the wordplay. But then I find the same missing letter, occurring very similarly, in the wordplay of 29 down. So how to construe 15 across? It's not a double definition. The obvious country has plenty of universities.