Language sounding like Polish? (7)
I believe the answer is:
finnish
'language' is the definition.
(language of Finland)
'sounding like polish?' is the wordplay.
'sounding like' indicates a 'sounds like' (homophone) clue.
'polish?' becomes 'finish' (as in polishing or finishing a surface).
'finish' sounds like 'FINNISH'.
(Other definitions for finnish that I've seen before include "Eg, native to Helsinki" , "Nationality of citizens of Helsinki" , "race" , "foreign language" , "European language" .)