Attend programme with dean regularly (6)
I believe the answer is:
listen
'attend' is the definition.
(I've seen this before)
'programme with dean regularly' is the wordplay.
'programme' becomes 'list' (list can mean a programme or schedule).
'with' says to put letters next to each other.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternating letters of 'dean' are 'en'.
'list'+'en'='LISTEN'
(Other definitions for listen that I've seen before include "Respond (to advice)" , "Give one's attention" , "Be silent in order to hear" , "Lend an ear (6)" , "Take notice" .)