Racecourse stew served with a savoury condiment (9,5)
I believe the answer is:
worcester sauce
'a savoury condiment' is the definition.
The definition suggests a singular noun which matches the answer.
'racecourse stew served' is the wordplay.
'served' indicates anagramming the letters.
'racecourse'+'stew'='racecoursestew'
'racecoursestew' with letters rearranged gives 'WORCESTER SAUCE'.
'with' is the link.
Can you help me to learn more?
(Other definitions for worcester sauce that I've seen before include "Savoury liquid" , "anchovies in it" .)