Obstruct a place in the market (5)
I believe the answer is:
stall
I believe this is a double definition.
'obstruct' is the first definition.
(thesaurus)
'a place in the market' is the second definition.
(market stall)
(Other definitions for stall that I've seen before include "Market stand; delay" , "outlet at a fair" , "Seat - prevaricate" , "Postpone what one should be doing" , "Stable compartment" .)