Soldiers shouting possibly when receiving a command (6)
I believe the answer is:
ordain
'command' is the definition.
(I've seen this in another clue)
'soldiers shouting possibly when receiving a' is the wordplay.
'soldiers' becomes 'OR' (Other Ranks).
'shouting possibly' becomes 'din' (I can't explain this - if you can you should believe this answer much more).
'when receiving' means one lot of letters goes inside another.
'din' going around 'a' is 'dain'.
'or'+'dain'='ORDAIN'
Can you help me to learn more?
(Other definitions for ordain that I've seen before include "Destine" , "Make a decree" , "Invest with priestly authority" , "Lay down (law)" , "Appoint - admit to holy orders" .)