Plan made by soldier among other soldiers (7)
I believe the answer is:
regimen
'plan' is the definition.
(I know that regimen is a type of plan)
'by soldier among other soldiers' is the wordplay.
'by' is a charade indicator (letters next to each other).
'soldier' becomes 'GI' (GI can mean a US soldier).
'among' says to put letters next to each other.
'other' becomes 'men' (I can't justify this - if you can you should give a lot more credence to this answer).
'soldiers' becomes 're' (Royal Engineers).
'gi'+'men'='gimen'
'gimen' put after 're' is 'REGIMEN'.
'made' acts as a link.
Can you help me to learn more?
(Other definitions for regimen that I've seen before include "Prescribed way of life like diet" , "(In medicine) a systematic plan for therapy" , "Mere gin for a course of treatment" , "Recommended course" , "Therapeutic programme (of diet and exercise)" .)