Aimed to revolutionise means of communication (5)
I believe the answer is:
media
'means of communication' is the definition.
(mass media)
'aimed to revolutionise' is the wordplay.
'to revolutionise' indicates an anagram (I've seen 'revolutionized' mean this).
'aimed' anagrammed gives 'MEDIA'.
(Other definitions for media that I've seen before include "Newspapers, TV, radio etc" , "News industry" , "means for spreading news" , "sources of information" , "region near Caspian Sea" .)