Greek character touring a second trading area from the East for seasoned meat (8)

'seasoned meat' is the definition.
'pastrami' can be an answer for 'meat' (pastrami is a kind of meat). I'm unsure of the 'seasoned' bit.

'greek character touring a second trading area from the east' is the wordplay.
'greek character' becomes 'pi' (letter from the Greek alphabet).
'touring' means one lot of letters goes inside another (touring can mean going round).
'second' becomes 's' (common abbreviation).
'trading area' becomes 'mart' (I can't explain this - if you can you should believe this answer much more).
'from the east' says the letters should be written backwards (on a map from right to left).
'mart' in reverse letter order is 'tram'.
'a'+'s'+'tram'='astram'
'pi' enclosing 'astram' is 'PASTRAMI'.

'for' acts as a link.

Can you help me to learn more?