Pleased when government confirmed agreement (9)
I believe the answer is:
gratified
'pleased' is the definition.
(similar in meaning)
'government confirmed agreement' is the wordplay.
'government' becomes 'g' (abbreviation for government).
'confirmed agreement' becomes 'ratified' (as in ratifying a treaty).
'g'+'ratified'='GRATIFIED'
'when' is the link.
(Other definitions for gratified that I've seen before include "Gave pleasure to" , "Indulged or pleased" , "Delighted" .)