No concessions from this virgin! (6)
I believe the answer is:
maiden
'this virgin' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for maiden that I've seen before include "Unmarried girl of old" , "First (speech)" , "First ever public address" , "No runs for the unmarried lady's over" , "Of an aunt, unmarried" .)