Able to translate and speak Polish (9)
I believe the answer is:
elaborate
'polish' is the definition.
(I've seen this before)
'able to translate and speak' is the wordplay.
'to translate' is an anagram indicator.
'and' says to put letters next to each other.
'speak' becomes 'orate' (orating is a kind of speaking).
'able' is an anagram of 'elab'.
'elab'+'orate'='ELABORATE'
(Other definitions for elaborate that I've seen before include "Intricate - ornament" , "Extravagant" , "Ostentatious, possibly" , "flesh out?" , "Very ornate or complex" .)