Bird a little way along window ledge (3)
I believe the answer is:
owl
'bird' is the definition.
(owl is a kind of bird)
'a little way along window ledge' is the wordplay.
'a little way along' indicates a hidden word.
'OWL' is hidden in the letters of 'window ledge'.
(Other definitions for owl that I've seen before include "Nocturnal bird of prey" , "Mainly nocturnal bird" , "You'll need hooter" , "Nocturnal hunter" , "Lear's loved a Pussy-cat" .)