Verified statement from the leading members of the Finnish-American comedy troupe (4)
I believe the answer is:
fact
'verified statement' is the definition.
'fact' can be an answer for 'statement' (I have seen 'True statement ' mean 'fact' so perhaps 'statement' could also mean 'fact'). I'm not sure about the 'verified' bit.
'from the leading members of the finnish-american comedy troupe' is the wordplay.
'the leading' indicates taking the first letters.
'members of the finnish american comedy troupe' becomes 'act' (I can't explain this - if you can you should give a lot more credence to this answer).
The initial letter of 'from' is 'f'.
'f'+'act'='FACT'
Can you help me to learn more?
(Other definitions for fact that I've seen before include "Certain thing" , "Verifiable truth" , "Statement of verifiable information" , "Fait accompli" , "Datum" .)