Influences troops (6)
I believe the answer is:
forces
This clue is a double definition.
'influences' is the first definition.
(force is a kind of influence)
'troops' is the second definition.
(I've seen this before)
(Other definitions for forces that I've seen before include "soldiers" , "Compels or inflicts" , "Compels or coerces" , "Influences" , "Pushes" .)