Field of pleasure (3)
I believe the answer is:
lea
'field' is the definition.
(lea can mean a meadow or field of grass)
'of pleasure' is the wordplay.
'of' says the answer is hidden in the clue.
'LEA' can be found hidden inside 'pleasure'.
(Other definitions for lea that I've seen before include "River of east London" , "Grass area" , "authority for teachers" , "Pasture, London river" , "Field" .)