Cricketer welcoming European's public remarks (4,6)
I believe the answer is:
open letter
'public remarks' is the definition.
'cricketer welcoming european's' is the wordplay.
'cricketer' becomes 'opener' (batsman who opens the batting).
'welcoming' means one lot of letters goes inside another (in sense of 'inviting in').
'european' becomes 'lett' (old-fashioned term for someone from Latvia).
'opener' enclosing 'lett' is 'OPEN-LETTER'.
(Other definitions for open letter that I've seen before include "Communication intended for public reading" , "Use knife, perhaps" , "public protest" , "Not a secret missive" , "widely-publicised protest" .)