Bear out, when you swindle the company (7)
I believe the answer is:
'bear out' is the definition.
'swindle the company' is the wordplay.
'swindle' becomes 'con' (con is a kind of swindle).
'the company' becomes 'firm' (firm can mean a company or business).
'when you' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for confirm that I've seen before include "Strengthen" , "Ratify or verify" , "Establish the truth of" , "Philosophy of life" , "Provide support for the truth" .)