One writer touring around Greek island feels tremors there (9)
I believe the answer is:
epicentre
'greek island feels tremors there' is the definition.
I can't tell whether this defines the answer.
'one writer touring around' is the wordplay.
I cannot really see how this works, but
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
'around' could be 'c' (abbreviation for 'circa') and 'c' is found within the answer.
'writer' could be 'pen' (something which writes) and 'pen' is present in the leftover letters.
The remaining letters 'etre' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for epicentre that I've seen before include "where maximum damage may occur" , "Point directly above the focus of an earthquake" , "Earthquake's point of focus" , "focal point" , "a very disturbed place" .)