Sends letters for jobs (5)
I believe the answer is:
posts
This clue could be a double definition.
'sends letters' is the first definition.
'posts' can be an answer for 'sends' ('post' can be a synonym of 'send'). I'm not sure about the 'letters' bit.
'for jobs' is the second definition.
(post is a kind of job)
Can you help me to learn more?
(Other definitions for posts that I've seen before include "Stakes" , "Mails the uprights?" , "Sends by mail" , "Positions, for guards say" , "Is dispatching" .)