Foot soldiers (8)
'foot soldiers' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for infantry that I've seen before include "Army unit of foot soldiers" , "Troops" , "fighting group" , "Men fighting" , "Unmounted fighters" .)
'foot soldiers' is the definition.
('infantryman' can be a synonym of 'foot soldier')
This is all the clue.