Fascinate one entering e.g. Turin somehow (8)
I believe the answer is:
intrigue
'fascinate' is the definition.
(I know that fascinate can be written as intrigue)
'one entering e g turin somehow' is the wordplay.
'one' becomes 'i' (Roman numeral).
'entering' means one lot of letters goes inside another.
'somehow' indicates anagramming the letters.
'e'+'g'+'turin'='egturin'
'egturin' with letters rearranged gives 'intrgue'.
'i' placed within 'intrgue' is 'INTRIGUE'.
(Other definitions for intrigue that I've seen before include "'Conspiracy, machination (8)'" , "Plot in underhand way" , "Illicit plotting" , "Secret scheme or conspiracy" , "Illicit plot" .)