Trophy - the Spanish knife (7)
I believe the answer is:
scalpel
'knife' is the definition.
(I know that scalpel is a type of surgical knife)
'trophy the spanish' is the wordplay.
'trophy' becomes 'scalp' (I've seen this before).
'the spanish' becomes 'el' ('the' in Spanish).
'scalp'+'el'='SCALPEL'
(Other definitions for scalpel that I've seen before include "Surgical instrument" , "A surgeon's knife 97)" , "Sharp blade" , "Surgeon's blade" , "Surgical blade" .)