Broadcast left disharmony, dismissing writer's latest lightweight stories (7,7)

I believe the answer is:

airport fiction

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'dismissing writer's latest lightweight stories' is the definition.
I can't tell whether this definition defines the answer.

'broadcast left disharmony' is the wordplay.
'broadcast' becomes 'air' (to air on TV).
'left' becomes 'port' (left side of a ship - opposite of starboard).
'disharmony' becomes 'fiction' (I can't explain this - if you can you should give a lot more credence to this answer).
'air'+'port'+'fiction'='AIRPORT FICTION'

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I've seen this clue in The Times.

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