Can't Understand This Cryptic Clue In Week Crossword 1165

[skinicod]

In this weeks crossword there is a clue: "Fly first class out of Burma's capital twice over". The answer is clearly Tsetse, but I can't understand why first class out of Burma's capital is tse. Any ideas?

[aelmpvw]

first class = (b)est

[Slingsho]

Fly = Tsetse fly. First Class = Best minus Burma's Capital which is B leaves estest which is bestbest twice minus the B's and so you are left with estest and flip it 'over' or backwards if you like so Tsetse!

[Old_Geezer]

This is why I can't get these. Where's the part suggesting one has to write it backwards ? Or are we just meant to try anagrams even when there's no suggestion ?

[donny48]

over implies backwards

[scorpiojo]

Over = reversed

[Old_Geezer]

Ah, ta. I read, which I suspect was expected, the last two words as a single phrase.
Wish I was better at this, but as I get older I'm getting worse. Struggle with some of the quick clues let alone the cryptic ones.