European problem in speech reflected on Greek character (7)
I believe the answer is:
epsilon
'greek character' is the definition.
(letter from the Greek alphabet)
'european problem in speech reflected on' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'problem in speech' becomes 'lisp' (I can't justify this - if you can you should give a lot more credence to this answer).
'reflected' shows that the letters should be reversed in order.
'lisp' written backwards gives 'psil'.
'e'+'psil'+'on'='EPSILON'
Can you help me to learn more?
(Other definitions for epsilon that I've seen before include "Greek character" , "Greek short E" , "small number mispronounced, almost completely the wrong way round" , "Greek letter - pinoles (anag)" , "Fifth letter of the Greek alphabet" .)