Source of possible leak in party close to governor (7)
I believe the answer is:
insider
'source of possible leak' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'in party close to governor' is the wordplay.
'party' becomes 'side' (eg a side or party in a contract).
'close to' suggests the final letters (the close of something is the end).
The last letter of 'governor' is 'r'.
'in'+'side'+'r'='INSIDER'
Can you help me to learn more?
(Other definitions for insider that I've seen before include "One with privileged info" , "one's not allowed to trade" , "Particularly advantaged person" , "One 24 [IN-SECT], perhaps" , "Person privy to information within an organisation" .)