Lay out 52 cards (4)
I believe the answer is:
deck
I believe this is a double definition.
'lay out' is the first definition.
(I've seen this in another clue)
'52 cards' is the second definition.
(I've seen this in another clue)
(Other definitions for deck that I've seen before include "Pack of playing cards on board" , "Adorn; pack of cards" , "red and black suits" , "Adorn; card pack" , "Pack of cards (US)" .)