Manage piece of poetry in Old English (7)
I believe the answer is:
oversee
'manage' is the definition.
(I know that manage is a kind of administer)
'piece of poetry in old english' is the wordplay.
'piece of poetry' becomes 'verse' (I've seen this before).
'in' indicates putting letters inside.
'old english' becomes 'OE'.
'verse' inserted within 'oe' is 'OVERSEE'.
(Other definitions for oversee that I've seen before include "Exercise supervision" , "Act as tutor" , "Supervise, keep an eye on" , "guide" , "survey" .)