Primitive means of communication evaluated: more than half is wasted (9)
I believe the answer is:
mediaeval
'primitive' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?
'of communication evaluated more than half is wasted' is the wordplay.
I cannot quite understand how this works, but
'communication' could be 'media' (media is a kind of communication) and 'media' is found in the answer.
The remaining letters 'eval' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'means' is the link.
Can you help me to learn more?
(Other definitions for mediaeval that I've seen before include "Old-fashioned" , "out of the Dark Ages" .)