Find commanding officer getting in after time (6)
I believe the answer is:
locate
'find' is the definition.
(locating is a kind of finding)
'commanding officer getting in after time' is the wordplay.
'commanding officer' becomes 'oc' (abbreviation for officer commanding).
'getting in' means one lot of letters goes inside another.
'after time' becomes 'late' (I've seen this before).
'oc' placed into 'late' is 'LOCATE'.
(Other definitions for locate that I've seen before include "spot" , "Find or situate" , "Pinpoint in Alecto" , "Find by searching" , "Find, or establish in particular place" .)