Frightful racket car produces here? (9)
I believe the answer is:
racetrack
'here?' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'frightful racket car' is the wordplay.
'frightful' is an anagram indicator (I've seen this in other clues).
'racket'+'car'='racketcar'
'racketcar' is an anagram of 'RACETRACK'.
'produces' is the link.
(Other definitions for racetrack that I've seen before include "Competitive course" , "Brands Hatch, perhaps" , "Circuit" , "Newmarket, say" , "Spa, say" .)