Soldiers, also, will be shown in the drawing (7)
I believe the answer is:
platoon
'soldiers' is the definition.
(group of soldiers)
'will be shown in the drawing' is the wordplay.
'will be' becomes 'too' (I can't explain this - if you can you should believe this answer much more).
'shown in' indicates putting letters inside.
'the drawing' becomes 'plan' (plan is a kind of drawing).
'too' placed into 'plan' is 'PLATOON'.
'also' is the link.
Can you help me to learn more?
(Other definitions for platoon that I've seen before include "Army unit" , "Small military unit" , "Subdivision of a company" , "Division of company" , "Military group" .)