The new man or woman (5)
I believe the answer is:
norma
'woman' is the definition.
'the new man or' is the wordplay.
'the new' is an anagram indicator.
'man'+'or'='manor'
'manor' with letters rearranged gives 'NORMA'.
(Other definitions for norma that I've seen before include "Opera - ex-PM's wife" , "Shearer or Major" , "Operatic work" , "The 'Rule' constellation" , "musical work" .)