Go-ahead for each embassy (10)
I believe the answer is:
permission
'go-ahead' is the definition.
(thesaurus)
'each embassy' is the wordplay.
'each' becomes 'per'.
'embassy' becomes 'mission' (I've seen this before).
'per'+'mission'='PERMISSION'
'for' is the link.
(Other definitions for permission that I've seen before include "Green light" , "Consent, authorisation" , "Allowance" , "Visa, eg" , "Leave" .)