Mail from settler (7)
I believe the answer is:
letters
'mail' is the definition.
(I've seen this before)
'from settler' is the wordplay.
'from' indicates an anagram (the anagram comes from the same letters).
'settler' with letters rearranged gives 'LETTERS'.
(Other definitions for letters that I've seen before include "Missives" , "They may indicate a degree" , "Literary culture" , "Written notes" , "providing digs?" .)