Draw something of the old school (3)
I believe the answer is:
tie
I believe this clue is a double definition.
'draw' is the first definition.
('tie' can be a synonym of 'draw')
'something of the old school' is the second definition.
(old school ties are worn by public school alumni)
(Other definitions for tie that I've seen before include "Draw - connection" , "Equal scores" , "Affiliation" , "Bind; dead heat" , "Fasten a parcel" .)