Shuffled, the cards will become stiff (8)
I believe the answer is:
starched
'stiff' is the definition.
(thesaurus)
'shuffled the cards' is the wordplay.
'shuffled' is an anagram indicator.
'the'+'cards'='thecards'
'thecards' anagrammed gives 'STARCHED'.
'will become' is the link.
(Other definitions for starched that I've seen before include "Made rigid" , "Stiffened (of shirts)" , "(Of fabric) stiffened" , "Stiffened with a carbohydrate" , "The cards (anag.)" .)