Hero of the Spanish police? (2,3)
I believe the answer is:
el cid
'hero' is the definition.
(I've seen this before)
'the spanish police?' is the wordplay.
'the spanish' becomes 'el'.
'police?' becomes 'cid'.
'el'+'cid'='EL CID'
'of' is the link.
(Other definitions for el cid that I've seen before include "C11 Spanish warrior hero" , "Role of Charlton" , "epic movie" , "Historic fighter" , "Rodrigo Diaz de Vivar was his original name" .)