Inferior like a racehorse, before Caulfield Derby finishes? (6)
I believe the answer is:
shoddy
'inferior' is the definition.
(similar in meaning)
'like a racehorse before caulfield derby finishes?' is the wordplay.
'like a racehorse' becomes 'shod' (I've seen this in another clue).
'before' is a charade indicator (letters next to each other).
'finishes?' says to take the final letters (I've seen 'finish' mean this).
The last letters of 'caulfield derby' are 'dy'.
'shod'+'dy'='SHODDY'
(Other definitions for shoddy that I've seen before include "Trashy" , "Cheap, of poor quality" , "inferior cloth" , "Badly engineered" , "Of poor quality or workmanship" .)