Move stealthily, parking right next to bird (5)
I believe the answer is:
prowl
'move stealthily' is the definition.
(synonyms)
'parking right next to bird' is the wordplay.
'parking' becomes 'p' (abbreviation on road signs).
'right' becomes 'r' (abbreviation).
'next to' says to put letters next to each other.
'bird' becomes 'owl' (owl is a kind of bird).
'p'+'r'+'owl'='PROWL'
(Other definitions for prowl that I've seen before include "Skulk" , "Walk menacingly" , "Go stealthily, as if searching" , "Walk around predatorily" , "Move around restlessly" .)