Bar, one offering pork pie that's been recalled (4)
I believe the answer is:
rail
'bar' is the definition.
(rail is a kind of bar)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for rail that I've seen before include "Complain bitterly - wading bird" , "Track - complain - bird" , "wader" , "Part of train track" , "Form of transport" .)