Cook's pan (5)
I believe the answer is:
roast
I believe this clue is a double definition.
'cook's' is the first definition.
(roasting is a kind of cooking)
'pan' is the second definition.
(I've seen this before)
(Other definitions for roast that I've seen before include "Cook with dry heat" , "Cook in oven or by exposure to heat" , "Have a go at" , "Cooked like chestnuts tonight" , "Cook (meat) in oven" .)