Trading centre to spoil the end of the street (4)
I believe the answer is:
mart
'trading centre' is the definition.
(I've seen this before)
'spoil the end of the street' is the wordplay.
'spoil' becomes 'mar' (synonyms).
'the end of the' says to take the final letters.
The final letter of 'street' is 't'.
'mar'+'t'='MART'
'to' acts as a link.
(Other definitions for mart that I've seen before include "Trading centre" , "Take tram to market" , "US shop; market" , "Place" .)