Cruise spot in central cast, yeah? (4)

I believe the answer is:

asea

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'cruise spot' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'central cast yeah?' is the wordplay.
'central' says to take the centre.
'yeah?' becomes 'ea' (I can't justify this - if you can you should believe this answer much more).
The middle of 'cast' is 'as'.
'as'+'ea'='ASEA'

'in' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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