Cards taken from new case (4)
I believe the answer is:
aces
'cards' is the definition.
(ace is a kind of card)
'new case' is the wordplay.
'new' indicates an anagram.
'case' anagrammed gives 'ACES'.
'taken from' is the link.
(Other definitions for aces that I've seen before include "wartime pilots?" , "Unreturnable services" , "Top (or bottom) cards" , "winning shots" , "passes with flying colours in US" .)