Full suit of armour (7)
I believe the answer is:
panoply
'full suit of armour' is the definition.
(historic term)
This is all the clue.
(Other definitions for panoply that I've seen before include "A complete or splendid array" , "Apply no mix to splendid array" , "Having full equipment" , "brilliant array" , "Superb array; suit of armour" .)