Made a false impression (6)
I believe the answer is:
forged
'made' is the definition.
(forging is a kind of making)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for forged that I've seen before include "Reproduced fraudulently" , "Counterfeit" , "What blacksmith did - made false money?" , "Made false and illegal currency" , "Made one's way steadily - in blacksmith's shop?" .)