Polish area of pan, vessel that's overturned (6)
I believe the answer is:
krakow
'polish area' is the definition.
(Krakow is a city in Poland)
'pan vessel that's overturned' is the wordplay.
'pan' becomes 'wok' (wok is a kind of pan).
'vessel' becomes 'ark' (ark is a kind of vessel).
'that's overturned' says the letters should be written in reverse.
'wok'+'ark'='wokark'
'wokark' back-to-front is 'KRAKOW'.
'of' acts as a link.
(Other definitions for krakow that I've seen before include "In Polish, southern city" , "Second city of Poland" , "Industrial city in southern Poland" .)