Travel kilometres across wood to see bird (7)
I believe the answer is:
goshawk
'bird' is the definition.
(I know that goshawk is a type of hawk)
'travel kilometres across wood' is the wordplay.
'travel' becomes 'go' (synonyms).
'kilometres' becomes 'k'.
'across' is an insertion indicator.
'wood' becomes 'shaw' (I've seen this before).
'go'+'k'='gok'
'gok' going around 'shaw' is 'GOSHAWK'.
'to see' is the link.
(Other definitions for goshawk that I've seen before include "Bird used in falconry" , "Short-winged bird of prey" .)