Dry skin can be so crazy! (5)
I believe the answer is:
flaky
'crazy' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for flaky that I've seen before include "pastry" , "Easily separating; unreliable" , "Tending to break or peel off - crazy" .)