Brave unnamed lady getting oxygen with intensive care (6)
I believe the answer is:
heroic
'brave' is the definition.
(I've seen this in another clue)
'unnamed lady getting oxygen with intensive care' is the wordplay.
'unnamed lady' becomes 'her' (her refers to a woman).
'getting' is a charade indicator (letters next to each other).
'oxygen' becomes 'O' (atomic symbol for oxygen).
'with' says to put letters next to each other.
'intensive care' becomes 'IC' (medical abbreviation).
'her'+'o'+'ic'='HEROIC'
(Other definitions for heroic that I've seen before include "Supremely courageous and brave" , "Showing no fear in the face of extreme difficulty" , "Dramatic" , "Like a brave man" , "Surpassing the ordinary, in courage say" .)