Maybe duck and cover (5)
I believe the answer is:
cloth
I believe this is a double definition.
'maybe duck' is the first definition.
(I know that duck is a type of cloth)
'cover' is the second definition.
(thesaurus)
'and' is the link.
(Other definitions for cloth that I've seen before include "Woven material" , "The clergy" , "rag" , "ministers" , "Gingham, say" .)