Create DNA component to bring before judge (8)
I believe the answer is:
generate
'create dna component' is the definition.
'generate' can be an answer for 'create' (generating is a kind of creating). I am not certain of the 'dna component' bit.
'before judge' is the wordplay.
'before' becomes 'gene' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'judge' becomes 'rate' (rating is a kind of judging).
'gene'+'rate'='GENERATE'
'to bring' acts as a link.
Can you help me to learn more?
(Other definitions for generate that I've seen before include "evolve" , "Create for teenager" , "Give rise to" , "Cause to arise; produce" , "Produce with green tea" .)