Congested (7)
'congested' is the definition.
('clog' can be a synonym of 'congest')
This is the entire clue.
(Other definitions for clogged that I've seen before include "Some morris dancers are" , "Congested, choked" , "Blocked" .)
(Other definitions for built-up that I've seen before include "Increased in height" , "Like urban area" , "praised" , "Like inner cities" , "Having houses etc" .)
'congested' is the definition.
This is the entire clue.
(Other definitions for turgid that I've seen before include "Distended, congested" , "Swollen; pompous (language)" , "Pompous (language); distended" , "'Pompous, inflated (6)'" , "Of language, pompous and not flowing easily" .)