Crossword Genius

Impediment (3)

Ross

I think it could be either:

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3

9

'impediment' is the definition.
('let' could historically mean a hindrance)

This is all the clue.

(Other definitions for let that I've seen before include "Permitted" , "Permit; lease" , "Allow the obstruction" , "Award (a contract)" , "Disappoint or fail to support - ... down" .)

I've seen this clue in The Telegraph and The Independent.
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