Crossword Genius

Swindle going unchecked puts worker perhaps off (4)

Ross

I believe the answer is:

ramp

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'swindle' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for ramp that I've seen before include "Something that's not on the level" , "Sloping passage" , "Slope for a pram" , "Level-connecting slope" , "Short slope" .)

I've seen this clue in The Times.
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