String player with second feature for Australian channel (4,6)

'australian channel' is the definition.
The definition suggests a singular noun which matches the answer.

'string player with second feature' is the wordplay.
I cannot really see how this works, but
'player' could be 'bass' (bass is a kind of player) and 'bass' is present in the answer.
'second' could be 's' (common abbreviation) and 's' is found in the answer.
'feature' could be 'trait' (I've seen this in another clue) and 'trait' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

'for' acts as a link.

Can you help me to learn more?