Special pleasure (5)
I believe the answer is:
treat
'special pleasure' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for treat that I've seen before include "Shout" , "Minister - buy one a drink" , "An indulgence; handle" , "Pay for someone else's enjoyment" , "Entertain at one's own expense" .)