Very good hole in the ground for bird (5)
I believe the answer is:
pipit
'bird' is the definition.
(pipit is a kind of bird)
'very good hole in the ground' is the wordplay.
'very good' becomes 'pi' (I've seen this in other clues).
'hole in the ground' becomes 'pit' (pit is a kind of hole in the ground).
'pi'+'pit'='PIPIT'
'for' acts as a link.
(Other definitions for pipit that I've seen before include "Songbird of rock or meadow" , "Small bird of rock or meadow" , "Meadowland bird" , "Ground-dwelling songbird" , "Songbird of open country" .)