Journey that results in pleasure first of all (4)
I believe the answer is:
trip
'journey' is the definition.
(I've seen this before)
'that results in pleasure first of all' is the wordplay.
'first of all' suggests taking the first letters.
The first letters of 'that results in pleasure' is 'TRIP'.
(Other definitions for trip that I've seen before include "Excursion (maybe hallucinatory!)" , "day out?" , "blunder" , "Run - dance - tumble" , "(Cause to) fall" .)