Settles deceit about Democrat victory, overwhelming (9)

I believe the answer is:

landslide

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'overwhelming' is the definition.
(as in a landslide victory)

'settles deceit about democrat' is the wordplay.
'settles' becomes 'lands' (I can't justify this - if you can you should give a lot more credence to this answer).
'deceit' becomes 'lie' (I've seen this in other clues).
'about' indicates putting letters inside.
'democrat' becomes 'd'.
'lie' enclosing 'd' is 'lide'.
'lands'+'lide'='LANDSLIDE'

'victory' 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 landslide that I've seen before include "Overwhelming success" , "big victory" , "Overwhelming election win" , "significant win in contest" , "Movement at grass-roots level" .)

I've seen this clue in The Telegraph.

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