No spiel about foreign character (7)
I believe the answer is:
epsilon
'foreign character' is the definition.
(Greek letter)
'no spiel about' is the wordplay.
'about' is an anagram indicator.
'no'+'spiel'='nospiel'
'nospiel' anagrammed gives 'EPSILON'.
(Other definitions for epsilon that I've seen before include "character in Greece" , "Greek letter E" , "One's lip (anag)" , "Greek character" , "foreign letter" .)