A university woman beginning to organise sound reproduction (5)
I believe the answer is:
audio
'sound reproduction' is the definition.
(I've seen this before)
'a university woman beginning to organise' is the wordplay.
'university' becomes 'u'.
'woman' becomes 'di' (**).
'beginning to' says to take the initial letters.
The initial letter of 'organise' is 'o'.
'a'+'u'+'di'+'o'='AUDIO'
(Other definitions for audio that I've seen before include "Sound, as opposed to vision" , "Sound broadcast" , "shown in reproduction" , "Acoustic reproduction" , "Prefix relating to sound" .)