Block, clog (8)

I believe the answer is:
obstruct
I believe this is a double definition.
'block' is the first definition.
(synonyms)
'clog' is the second definition.
(thesaurus)
(Other definitions for obstruct that I've seen before include "Hamper" , "Hinder or impede" , "Stymie" , "Get in the way of" , "Block the passage or shut out the view" .)