Psychic in fear entering water off Marseille? (4-6)
I believe the answer is:
mind-reader
'psychic' is the definition.
(someone with psychic powers)
'in fear entering water off marseille?' is the wordplay.
'fear' becomes 'dread' (dread is a kind of fear).
'entering' means one lot of letters goes inside another.
'water off marseille?' becomes 'mer' ('sea' in French).
'in'+'dread'='indread'
'indread' inserted within 'mer' is 'MIND-READER'.
(Other definitions for mind-reader that I've seen before include "Thought diviner" , "Telepathist" , "One with psychic powers" , "stage entertainer" , "one with special powers" .)