It's funny about getting caught in the swindle (6)
I believe the answer is:
scream
'it's funny' is the definition.
(I know that scream are often amusing)
'getting caught in the swindle' is the wordplay.
'getting caught' becomes 're' (I can't justify this - if you can you should believe this answer much more).
'in the' means one lot of letters goes inside another.
'swindle' becomes 'scam' (scam is a kind of swindle).
're' inserted inside 'scam' is 'SCREAM'.
'about' acts as a link.
Can you help me to learn more?
(Other definitions for scream that I've seen before include "'Sharp, piercing cry (6)'" , "Person who seems extremely funny?" , "Howl, shriek" , "Funny person; cry" , "Riot" .)