Show how scattered Armada lacked leadership (5)
I believe the answer is:
drama
'show' is the definition.
(I've seen this before)
'scattered armada lacked leadership' is the wordplay.
'scattered' is an anagram indicator.
'lacked leadership' means to remove the first letter (I've seen 'lacking leadership' mean this).
'armada' with its initial letter taken off is 'rmada'.
'rmada' with letters rearranged gives 'DRAMA'.
'how' acts as a link.
(Other definitions for drama that I've seen before include "Play, emotional series of events" , "Theatrical work" , "Exciting play or event" , "Plays as a genre" , "Play - crisis" .)