Cover for house or head (6)
I believe the answer is:
thatch
I believe this is a double definition.
'cover for house' is the first definition.
(I've seen this before)
'head' is the second definition.
(thesaurus)
(Other definitions for thatch that I've seen before include "Natural roof covering" , "Old roof covering for house" , "unusual roof" , "Material used to cover" , "Rural roofing" .)