Sturdy plant blocking stone path (6)
I believe the answer is:
street
'path' is the definition.
(thesaurus)
'sturdy plant blocking stone' is the wordplay.
'sturdy plant' becomes 'tree' (trees are strong, sturdy plants).
'blocking' indicates putting letters inside (block can mean to plug a gap in something).
'stone' becomes 'st' (abbreviation).
'tree' inserted within 'st' is 'STREET'.
(Other definitions for street that I've seen before include "See 14" , "Roadway" , "Tester in public road" , "See 17" , "Thoroughfare lined with buildings" .)