Outline for military service? (5)
I believe the answer is:
draft
This clue is a double definition.
'outline' is the first definition.
(I know that outline can be written as draft)
'military service?' is the second definition.
(being drafted for military service)
'for' acts as a link.
(Other definitions for draft that I've seen before include "Rough sketch" , "Preliminary outline" , "Preliminary text or plan" , "Provisional document" , "Current of air or preliminary version" .)