He’s still alive, extraordinarily over virus without using drug (8)
I believe the answer is:
survivor
'he's still alive' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'extraordinarily over virus without using drug' is the wordplay.
'extraordinarily' indicates anagramming the letters (I've seen this in other clues).
'without using' suggests deleting specific letters.
'drug' becomes 'e' (E is another name for ecstasy).
'over'+'virus'='overvirus'
'overvirus' with 'e' taken away is 'ovrvirus'.
'ovrvirus' anagrammed gives 'SURVIVOR'.
Can you help me to learn more?
(Other definitions for survivor that I've seen before include "One who continues to live after ordeal" , "One staying the course" , "One remaining alive" , "One who outlives another" , "One outliving" .)