Sea salt scattered in map books (7)
I believe the answer is:
atlases
'map books' is the definition.
(I've seen this before)
'sea salt scattered' is the wordplay.
'scattered' indicates an anagram.
'sea'+'salt'='seasalt'
'seasalt' anagrammed gives 'ATLASES'.
'in' is the link.
(Other definitions for atlases that I've seen before include "Book of maps" , "Sea salt (anag.)" , "Sea-salt (anag)" , "Collected charts" , "Map books" .)