Bird Christopher brought to Spain (4)
I believe the answer is:
kite
'bird' is the definition.
(I know that kite is a type of hawk)
'christopher brought to spain' is the wordplay.
'christopher' becomes 'Kit' (short for Christopher).
'brought to' means one lot of letters go next to another.
'spain' becomes 'e' (abbreviation for Espana).
'kit'+'e'='KITE'
(Other definitions for kite that I've seen before include "Flying toy or kind of hawk" , "A flying toy or sea bird" , "Bird of prey - light, wind-borne structure" , "Toy; aircraft (dated)" , "Quadrilateral; bird" .)