Caught greeting foreign character (3)
I believe the answer is:
chi
'foreign character' is the definition.
(Greek letter)
'caught greeting' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'greeting' becomes 'hi' (hi is a kind of greeting).
'c'+'hi'='CHI'
(Other definitions for chi that I've seen before include "foreign character" , "Greek X" , "Letter written by European" , "Greek character" , "character in Thessaloniki" .)