Evaded vocalist performing as contentious person (6,8)
I believe the answer is:
devils advocate
'contentious person' is the definition.
'devil's advocate' can be an answer for 'person' (devil's advocate is a kind of person). I'm not sure about the 'contentious' bit.
'evaded vocalist performing' is the wordplay.
'performing' indicates anagramming the letters (the letters move around or 'perform').
'evaded'+'vocalist'='evadedvocalist'
'evadedvocalist' is an anagram of 'DEVILS ADVOCATE'.
'as' acts as a link.
Can you help me to learn more?
(Other definitions for devils advocate that I've seen before include "one provoking debate" , "One looking for wickedness" , "Arguer for unpopular cause" , "One taking opposing line to provoke debate" , "One deliberately introducing a controversial idea to debate" .)