Cover holds directions that are wrinkled (5)
I believe the answer is:
lined
'are wrinkled' is the definition.
(I've seen this before)
'cover holds directions' is the wordplay.
'cover' becomes 'line' (lining is a kind of covering).
'holds directions' becomes 'd' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'line'+'d'='LINED'
'that' acts as a link.
Can you help me to learn more?
(Other definitions for lined that I've seen before include "displaying signs of age" , "Marked by seams or wrinkles" , "Covered inner surface" , "(Of a face) showing its age" , "Covered internally" .)