Character you may cross in Athens? (3)
I believe the answer is:
tau
This could be a double definition.
'character you' is the first definition.
'tau' can be an answer for 'character' (I've seen this before). I'm not certain of the 'you' bit.
'cross in athens?' is the second definition.
'tau' can be an answer for 'cross' (tau cross is a kind of cross). I'm unsure of the 'in athens?' bit.
'may' acts as a link.
Can you help me to learn more?
(Other definitions for tau that I've seen before include "A subatomic particle" , "Greek letter; cross" , "19th letter of the Greek alphabet" , "Marathon character" , "Homeric character" .)