Crockett's last battle (5)
I believe the answer is:
alamo
'crockett's last battle' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for alamo that I've seen before include "Scene of massacre in Texas" , "The answer is a place of siege" , "Where Davy Crockett died, 1836" , "Fort in San Antonio, once famously besieged" , "The red planet" .)