European arranged tail on Scot (7)
I believe the answer is:
italian
'european' is the definition.
(I know that Italian is a type of european)
'arranged tail on scot' is the wordplay.
'arranged' is an anagram indicator (letters rearranged).
'on' is an insertion indicator.
'scot' becomes 'ian' (Scottish given name).
'tail' with letters rearranged gives 'tali'.
'tali' put into 'ian' is 'ITALIAN'.
(Other definitions for italian that I've seen before include "Mixed with gin" , "'From Milan or Venice, say (7)'" , "From Bologna?" , "European tongue" , "Relating to a Neapolitan, say" .)