Letters to be mailed to a remote settlement? (7)
I believe the answer is:
outpost
'a remote settlement?' is the definition.
(I've seen this before)
'letters to be mailed' is the wordplay.
'letters' becomes 'post' (letters in the mail or post).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'be mailed' becomes 'out' (I can't explain this - if you can you should give a lot more credence to this answer).
'post' after 'out' is 'OUTPOST'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for outpost that I've seen before include "A distant branch or settlement" , "Remote settlement" , "settlement difficult to reach?" , "Distant military camp" , "Remote place" .)