Pointer, perhaps warning better used about Government (10)
I believe the answer is:
forefinger
'pointer perhaps' is the definition.
(a forefinger may point at things)
'warning better used about government' is the wordplay.
'warning' becomes 'fore' (I've seen this before).
'better' becomes 'finer'.
'used about' indicates putting letters inside.
'government' becomes 'g' (abbreviation for government).
'finer' placed around 'g' is 'finger'.
'fore'+'finger'='FOREFINGER'
(Other definitions for forefinger that I've seen before include "index" , "Digit next to the thumb" .)