Information from those on the ground? (3-4)
I believe the answer is:
low-down
I believe this is a double definition.
'information' is the first definition.
(I know that low-down is a type of details)
'those on the ground?' is the second definition.
(low down on the ground)
'from' acts as a link.
(Other definitions for low-down that I've seen before include "Mean, unfair" , "Inside story" , "Info (slang) - dishonourable" , "Inside information - mean (7;3-4)" , "Data - base" .)