Nice land worker has left (8)
I believe the answer is:
pleasant
'nice' is the definition.
(similar in meaning)
'land worker has left' is the wordplay.
'land worker' becomes 'peasant' (I've seen this before).
'has' means one lot of letters goes inside another.
'left' becomes 'L' (common abbreviation).
'peasant' placed around 'l' is 'PLEASANT'.
(Other definitions for pleasant that I've seen before include "Lovely" , "Delightful" , "Refreshing" , "Enjoyable, nice" , "Affable, good-humoured" .)