Psychic says to watch out for person in library (4-6)
I believe the answer is:
mind-reader
'psychic' is the definition.
(someone with psychic powers)
'says to watch out for person in library' is the wordplay.
I cannot really see how this works, but
'watch' could be 'mind' (minding is a kind of watching) and 'mind' is found in the answer.
'person' could be 'reader' (reader is a kind of person) and 'reader' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for mind-reader that I've seen before include "Thought diviner" , "one with special powers" , "One with psychic powers" , "stage entertainer" , "Telepathist" .)