Landmark seen in Australian port after docking (5)
I believe the answer is:
cairn
'landmark' is the definition.
(a pile of stones)
'australian port after docking' is the wordplay.
'australian port' becomes 'Cairns' (port in Australia).
'after docking' means to remove the last letter (to dock is to remove the end from).
'cairns' with its last letter removed is 'CAIRN'.
'seen in' is the link.
(Other definitions for cairn that I've seen before include "Burial place of old" , "Burial mound" , "Piled-stone marker" , "Heap of stones as a monument" , "Mound of stones on mountain top" .)