Shy, hide (4)
I believe the answer is:
pelt
This clue is a double definition.
'shy' is the first definition.
(thesaurus)
'hide' is the second definition.
('pelt' can be a synonym of 'hide')
(Other definitions for pelt that I've seen before include "Hide; rain" , "Hurl missiles at" , "Skin of a fur-bearing mammal" , "Throw - animal skin" , "Rain cats and dogs" .)