A key assistant in S. Australian city (8)
I believe the answer is:
adelaide
'australian city' is the definition.
(I've seen this before)
'a key assistant' is the wordplay.
'key' becomes 'del' (del key on a keyboard).
'assistant' becomes 'aide' (aide is a kind of assistant).
'a'+'del'+'aide'='ADELAIDE'
'in s' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for adelaide that I've seen before include "Commonwealth city" , "Lead aide to Oz" , "town" , "port in Oz" , "Girl" .)