Policeman perhaps present, keeping in charge (7)
I believe the answer is:
officer
'policeman perhaps' is the definition.
(I know that police officer is a type of law enforcement officer)
'present keeping in charge' is the wordplay.
'present' becomes 'offer' (I've seen this before).
'keeping' indicates putting letters inside.
'in charge' becomes 'ic' (abbreviation for 'in charge').
'offer' going around 'ic' is 'OFFICER'.
(Other definitions for officer that I've seen before include "Commissioned member of the services" , "Detective" , "Public servant" , "Holder of a commission in the armed forces" , "Possibly general" .)