Upset hot rod fans, etc (3,2,5)
I believe the answer is:
and so forth
'etc' is the definition.
(I've seen this before)
'upset hot rod fans' is the wordplay.
'upset' is an anagram indicator.
'hot'+'rod'+'fans'='hotrodfans'
'hotrodfans' with letters rearranged gives 'AND SO FORTH'.
(Other definitions for and so forth that I've seen before include "etc." , "imagine what follows" , "implies others of the same type" , "Along with other things" , "Et cetera" .)