She's entitled to get her island included by European ship (7)
I believe the answer is:
heiress
'she's entitled to' is the definition.
I can't judge whether this defines the answer.
'her island included by european ship' is the wordplay.
'island' becomes 'i' (geographical abbreviation).
'included' means one lot of letters goes inside another.
'by' says to put letters next to each other.
'european' becomes 'e' (abbreviation e.g. EU).
'ship' becomes 'SS' (prefix in ship names eg SS Great Britain).
'her' placed around 'i' is 'heir'.
'heir'+'e'+'ss'='HEIRESS'
'get' is the link.
Can you help me to learn more?
(Other definitions for heiress that I've seen before include "Inheritrix" , "Woman who will inherit great wealth" , "One due to inherit" , "Woman with good prospects" , "Woman destined to succeed!" .)