Son and father in European country (5)
I believe the answer is:
spain
'european country' is the definition.
(country in Europe)
'son and father in' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'and' means one lot of letters go next to another.
'father' becomes 'pa' (pa can mean dad or father).
's'+'pa'+'in'='SPAIN'
(Other definitions for spain that I've seen before include "ditto" , "location of Estoril" , "holiday destination?" , "Country bordering Andorra" , "Iberian country" .)