So trades can be varied (8)
I believe the answer is:
assorted
'varied' is the definition.
(thesaurus)
'so trades can be' is the wordplay.
'can be' indicates an anagram.
'so'+'trades'='sotrades'
'sotrades' is an anagram of 'ASSORTED'.
(Other definitions for assorted that I've seen before include "Rod's seat (anag)" , "Containing various different kinds" , "Various, diverse" , "Of various types put together" , "Of different kinds put together, like sweets" .)