Brown most of duck, turning that in pot (7)
I believe the answer is:
tankard
'in pot' is the definition.
'tankard' can be an answer for 'pot' (I've seen this before). I am not sure about the 'in' bit.
'brown most of duck turning' is the wordplay.
'brown' becomes 'tan' (tan is a kind of brown).
'most of duck turning' becomes 'kard' (I can't explain this - if you can you should give a lot more credence to this answer).
'tan'+'kard'='TANKARD'
'that' is the link.
Can you help me to learn more?
(Other definitions for tankard that I've seen before include "One-handled beer mug" , "Drank at (anag)" , "Beer-glass" , "Beer-mug" , "Vessel tracked" .)