Pure tea set out (6)
I believe the answer is:
chaste
'pure' is the definition.
(chaste means abstaining from sex)
'tea set out' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'set' anagrammed gives 'ste'.
'cha'+'ste'='CHASTE'
(Other definitions for chaste that I've seen before include "Morally pure" , "Innocent" , "Sachet (anag)" , "Undefiled" , "Modest, pure" .)