No spiel, surprisingly, in letter from Greece (7)
I believe the answer is:
epsilon
'letter from greece' is the definition.
(letter from the Greek alphabet)
'no spiel surprisingly' is the wordplay.
'surprisingly' indicates anagramming the letters (a surprising ordering of the letters).
'no'+'spiel'='nospiel'
'nospiel' is an anagram of 'EPSILON'.
'in' is the link.
(Other definitions for epsilon that I've seen before include "character in Greece" , "Fifth brightest star in a constellation" , "Greek letter E" , "Greek character" , "One's lip (anag)" .)