Frauds causing anger in the Civil Service (6)
I believe the answer is:
cheats
'frauds' is the definition.
(cheat is a kind of fraud)
'anger in the civil service' is the wordplay.
'anger' becomes 'heat' (I can't justify this - if you can you should give a lot more credence to this answer).
'in' is an insertion indicator.
'the civil service' becomes 'cs'.
'heat' placed within 'cs' is 'CHEATS'.
'causing' acts as a link.
Can you help me to learn more?
(Other definitions for cheats that I've seen before include "'Tricks, deceives (6)'" , "Defrauds of sachet" , "Swindles or deceives as at cards" , "Swindles in chaste manner" , "Dishonest dealers" .)