Bluejay appearing regularly in meadow (3)
I believe the answer is:
lea
'meadow' is the definition.
(a lea is a grassy area)
'bluejay appearing regularly' is the wordplay.
'appearing regularly' means one should take alternating letters.
The alternate letters of 'bluejay' are 'LEA'.
'in' is the link.
(Other definitions for lea that I've seen before include "'The lowing herd wind slowly o'er the . . .'" , "''The lowing herd winds slowly o'er the ... '' (Gray)" , "Grazing land" , "Field" , "Land growing grass" .)