Bird runs into bovine (4)
I believe the answer is:
crow
'bird' is the definition.
(crow is a kind of bird)
'runs into bovine' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'into' is an insertion indicator.
'bovine' becomes 'cow' (cow is a kind of bovine).
'r' placed into 'cow' is 'CROW'.
(Other definitions for crow that I've seen before include "Common bird" , "Make sound of cock - bird" , "Native American -- bird" , "Black bird; brag" , "One commonly stoned" .)