Published letters in remote military camp (7)
I believe the answer is:
outpost
'remote military camp' is the definition.
(I've seen this before)
'published letters' is the wordplay.
'published' becomes 'out' (I've seen this in other clues).
'letters' becomes 'post' (I've seen this before).
'out'+'post'='OUTPOST'
'in' is the link.
(Other definitions for outpost that I've seen before include "Distant military camp" , "distant location" , "Distant part (of empire)" , "Remote branch" , "Remote part of the country" .)