Disregard poetry in Old English (7)
I believe the answer is:
oversee
'disregard' is the definition.
(I've seen this before)
'poetry in old english' is the wordplay.
'poetry' becomes 'verse' (lines written in verse).
'in' is an insertion indicator.
'old english' becomes 'OE'.
'verse' put inside 'oe' is 'OVERSEE'.
(Other definitions for oversee that I've seen before include "risk eyestrain?" , "Supervise, keep an eye on" , "Superintend, manage" , "Inspect" , "Act as tutor" .)