Sports collectibles (5)
I believe the answer is:
cards
'sports collectibles' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cards that I've seen before include "Christmas post" , "Eg, jack and ace" , "Combs (wool); pack of --" , "With which to play snap or patience, perhaps" , "Notelets" .)