Relaxing, retailing pork pies (5)
I believe the answer is:
lying
'retailing pork pies' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for lying that I've seen before include "Perjury" , "Prone; fibbing" , "Telling fibs" , "Fabrication" , "Spread out" .)