Blocks; hinders (9)

I believe the answer is:

obstructs

This clue is a double definition.

'blocks' is the first definition.
(I know this)

'hinders' is the second definition.
('obstruct' can be a synonym of 'hinder')

(Other definitions for obstructs that I've seen before include "Prevents or hinders passage" , "Blocks" .)

I've seen this clue in The Times.

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