Crossword Genius

Block up; obstruct (7)

Ross

I believe the answer is:

occlude

I believe this clue is a double definition.

'block up' is the first definition.
(thesaurus)

'obstruct' is the second definition.
(synonyms)

(Other definitions for occlude that I've seen before include "Block, obstruct" , "Cod clue to shut out" , "cover" , "Cut or shut off" , "Close up, obstruct" .)

I've seen this clue in The Guardian.
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