Refuse to be seen in riverside Brisbane (6)
I believe the answer is:
debris
'refuse' is the definition.
(I've seen this in another clue)
'seen in riverside brisbane' is the wordplay.
'seen in' says the answer is hidden in the clue.
'DEBRIS' is hidden within 'riverside brisbane'.
'to be' is the link.
(Other definitions for debris that I've seen before include "Brides with pieces of rubble" , "Rubble, lots of broken pieces" , "Rubble as of fallen building" , "Rubble, detritus" , "Refuse, litter" .)