New deal started during the forenoon (6)

I believe the answer is:

modern

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'new' is the definition.
(synonyms)

'started during the forenoon' is the wordplay.
'started' becomes 'de' (I can't explain this - if you can you should give a lot more credence to this answer).
'during' indicates putting letters inside.
'the forenoon' becomes 'morn' (synonyms).
'de' inserted into 'morn' is 'MODERN'.

'deal' is the link.
I am not very happy about this link. It may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for modern that I've seen before include "The very latest available" , "Belonging to the present or recent times" , "Activity of 18 ac" , "Fashionable (like the new Tate gallery?)" , "Of the present time or current fashion" .)

I've seen this clue in the Evening Standard.

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