Virgin turned off when drinking tea (9)
I believe the answer is:
uncharted
'virgin' is the definition.
(thesaurus)
'turned off when drinking tea' is the wordplay.
'off' is an anagram indicator.
'when drinking' means one lot of letters goes inside another.
'tea' becomes 'cha' (cha is a type of tea).
'turned' anagrammed gives 'unrted'.
'unrted' going around 'cha' is 'UNCHARTED'.
(Other definitions for uncharted that I've seen before include "Of regions not yet surveyed" , "Not mapped for navigation" .)