Psychic digger swallowing fear (4-6)
I believe the answer is:
mind-reader
'psychic' is the definition.
(someone with psychic powers)
'digger swallowing fear' is the wordplay.
'digger' becomes 'miner' (I've seen this in another clue).
'swallowing' means one lot of letters goes inside another.
'fear' becomes 'dread' (synonyms).
'miner' going around 'dread' 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" .)