Teacher’s policy primarily delivered cover in retirement (9)
I believe the answer is:
bedspread
'cover in retirement' is the definition.
(cover used when one has retired to bed)
'teacher's policy primarily delivered' is the wordplay.
'teacher's' becomes 'beds' (bachelor of education).
'primarily' indicates taking the first letters.
'delivered' becomes 'read' (as in delivering a speech).
The first letter of 'policy' is 'p'.
'beds'+'p'+'read'='BEDSPREAD'
(Other definitions for bedspread that I've seen before include "Cover" , "Coverlet" , "Counterpane" .)