Cult’s aims involved mixed media (9)
I believe the answer is:
simulcast
'cult's aims involved mixed media' is the definition.
I can't tell whether this defines the answer.
'cult's aims involved' is the wordplay.
'involved' indicates an anagram (involved can mean confusing or complex).
'cults'+'aims'='cultsaims'
'cultsaims' is an anagram of 'SIMULCAST'.
Can you help me to learn more?
(Other definitions for simulcast that I've seen before include "entertainment" , "Same programme put out at the same time by two or more channels" .)