More treacherous European dropped by more deceitful (7)

I believe the answer is:

snakier

'more treacherous' is the definition.
(I've seen this in another clue)

'european dropped by more deceitful' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'dropped by' is a deletion indicator.
'more deceitful' becomes 'sneakier' (I've seen this in another clue).
'sneakier' with 'e' removed is 'SNAKIER'.

I've seen this clue in The Telegraph.

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