Cards on the floor (4)
I believe the answer is:
deck
I believe this clue is a double definition.
'cards' is the first definition.
(I've seen this before)
'the floor' is the second definition.
(I've seen this in another clue)
'on' acts as a link.
(Other definitions for deck that I've seen before include "part of ship" , "red and black suits" , "Pack of playing cards on board" , "Pack - part of record player" , "Adorn; level on ship" .)