Course to cook tacos (5)
I believe the answer is:
ascot
'course' is the definition.
(I've seen this before)
'cook tacos' is the wordplay.
'cook' indicates an anagram.
'tacos' anagrammed gives 'ASCOT'.
'to' acts as a link.
(Other definitions for ascot that I've seen before include "racing centre" , "Royal race course" , "Racecourse, home to the Gold Cup since 1807" , "Berks racecourse" , "track" .)