The field of pleasure (3)
I believe the answer is:
lea
'the field' is the definition.
(lea can mean a meadow or field of grass)
'of pleasure' is the wordplay.
'of' indicates a hidden word.
'LEA' is hidden within 'pleasure'.
(Other definitions for lea that I've seen before include "grazing area" , "area of grassland" , "Poetically, a piece of meadow or pasture" , "Grass area" , "Grazing land" .)