Tract in meadow left wild (7)
I believe the answer is:
leaflet
'tract' is the definition.
(I've seen this before)
'meadow left wild' is the wordplay.
'meadow' becomes 'lea' (a lea is a grassy area).
'wild' indicates an anagram.
'left' with letters rearranged gives 'flet'.
'lea'+'flet'='LEAFLET'
'in' acts as a link.
(Other definitions for leaflet that I've seen before include "Publication on single sheet" , "Distribute small circulars" , "Printed handout" , "Advertising sheet" , "Flier" .)