Pleased with field (3)
I believe the answer is:
lea
'field' is the definition.
(lea can mean a meadow or field of grass)
'pleased with' is the wordplay.
'with' indicates the answer is hidden within the clue.
'LEA' is hidden in the letters of 'pleased'.
(Other definitions for lea that I've seen before include "'The lowing herd wind slowly o'er the . . .'" , "Meadow (poetic)" , "Open grassy land; river" , "Grazing land" , "Open country" .)