Mission accomplished -- like another mission -- on all fronts? (5)

I believe the answer is:

alamo

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But I can't explain it at all! Could you help me understand?

(Other definitions for alamo that I've seen before include "Where Jim Bowie died" , "don't forget it!" , "Famous Texan mission" , "Famous battle site in Texas" , "historical Franciscan mission" .)

I've seen this clue in The Telegraph.

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