Some soldiers in Verdun I think (4)
I believe the answer is:
unit
'some soldiers' is the definition.
(unit can mean a group of soldiers )
'in verdun i think' is the wordplay.
'in' indicates a hidden word.
'UNIT' is hidden in the letters of 'verdun i think'.
(Other definitions for unit that I've seen before include "A considerable number of soldiers" , "Any division of quantity accepted as a standard of measurement" , "Entity making up part of a whole" , "hospital department" , "Module" .)