Battleship should get darned deployed first (11)
I believe the answer is:
dreadnought
'battleship' is the definition.
(I know that Dreadnought is a type of battleship)
'should get darned deployed first' is the wordplay.
'should get' becomes 'ought' (I am not sure about this - if you are sure you should believe this answer much more).
'deployed' indicates an anagram.
'first' is a charade indicator (letters next to each other).
'darned' with letters rearranged gives 'dreadn'.
'ought' after 'dreadn' is 'DREADNOUGHT'.
Can you help me to learn more?
(Other definitions for dreadnought that I've seen before include "Revolutionary British battleship (1906) - first British nuclear-powered submarine (1963)" , "Old battleship" , "Early 20th-century class of battleship" , "Vessel" , "One has no fear whatever" .)