Spy contract (4)
I believe the answer is:
bond
I believe this clue is a double definition.
'spy' is the first definition.
(James Bond)
'contract' is the second definition.
(I've seen this before)
(Other definitions for bond that I've seen before include "Fastening; financial certificate" , "Unite" , "Affinity" , "Something that joins together, or a financial document" , "James ...., fiction's 007" .)