Sounds and visuals I edit, almost all mum rubbished (10)
I believe the answer is:
multimedia
'sounds and visuals' is the definition.
I can't judge whether this defines the answer.
'i edit almost all mum rubbished' is the wordplay.
'almost' means to remove the last letter (almost the whole word is kept).
'rubbished' indicates an anagram.
'all' with its last letter taken away is 'al'.
'i'+'edit'+'al'+'mum'='ieditalmum'
'ieditalmum' anagrammed gives 'MULTIMEDIA'.
Can you help me to learn more?
(Other definitions for multimedia that I've seen before include "Way of presenting data" , "Using several means of communication" , "several channels" , "Mail tedium (anag.)" .)