Divers are always covered in salt (7)
I believe the answer is:
several
'divers' is the definition.
(thesaurus)
'always covered in salt' is the wordplay.
'always' becomes 'ever' ('ever' can be a synonym of 'always').
'covered in' is an insertion indicator.
'salt' becomes 'sal' (I've seen this in other clues).
'ever' put within 'sal' is 'SEVERAL'.
'are' is the link.
(Other definitions for several that I've seen before include "Divers" , "Indefinite number more than two or three, but not many" , "A few; separate" , "Some participants" , "More than one or two" .)