Problem screening Love Island in European country there (5)
I believe the answer is:
suomi
'european country there' is the definition.
I can't tell whether this definition defines the answer.
'problem screening love island' is the wordplay.
'problem' becomes 'sum' (arithmetic problem).
'screening' is an insertion indicator (inserted letters are covered or screened by others).
'love' becomes 'o' (love means zero in tennis).
'island' becomes 'i' (geographical abbreviation).
'sum' enclosing 'o' is 'suom'.
'suom'+'i'='SUOMI'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for suomi that I've seen before include "land to its natives" , "Country" , "Finnish language; I sumo (anag.)" , "Finland in Finnish" .)