Fantasy world a chap has left in terror (9)

I believe the answer is:

dreamland

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'a chap has left in terror' is the definition.
I can't judge whether this defines the answer.

'fantasy world' is the wordplay.
'fantasy' becomes 'dream' (dream is a kind of fantasy).
'world' becomes 'land' (I can't explain this - if you can you should give a lot more credence to this answer).
'dream'+'land'='DREAMLAND'

Can you help me to learn more?

(Other definitions for dreamland that I've seen before include "Utopia" , "Nod, perhaps" , "Sleep; ideal world" .)

I've seen this clue in The Daily Express.

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