Truck moving port round isle, one in the whole last across answer ... (4,6)

'one in the whole last across answer' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'truck moving port round isle' is the wordplay.
'moving' indicates an anagram.
'port' becomes 'oban' (I've seen this before).
'round' means one lot of letters goes inside another.
'isle' becomes 'i'.
'truck' anagrammed gives 'kurtc'.
'kurtc'+'oban'='kurtcoban'
'kurtcoban' enclosing 'i' is 'KURT COBAIN'.