Old boy ogled and followed (6)
I believe the answer is:
obeyed
'followed' is the definition.
(I've seen this in another clue)
'old boy ogled' is the wordplay.
'old boy' becomes 'OB' (abbreviation for a private school 'old boy').
'ogled' becomes 'eyed' (I've seen this in another clue).
'ob'+'eyed'='OBEYED'
'and' acts as a link.
(Other definitions for obeyed that I've seen before include "Complied with order" , "Carried out someone's instructions" , "Compiled with directive" , "Followed orders" , "What "She" must be" .)