Scalp covering (4)
I believe the answer is:
hair
'scalp covering' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hair that I've seen before include "Threadlike strands growing from the skin" , "Show" , "Fur, say" , "Thread-like strands on the body" , "Famous hirsute musical with song ` `Aquarius' ' (4)" .)