A girl in distress — something sought by knights (5)
I believe the answer is:
grail
'aeur something sought by knights' is the definition.
I can't tell whether this definition defines the answer.
'a girl in distress' is the wordplay.
'in distress' is an anagram indicator.
'a'+'girl'='agirl'
'agirl' with letters rearranged gives 'GRAIL'.
Can you help me to learn more?
(Other definitions for grail that I've seen before include "Fabled holy vessel" , "Legendary cup sought by knights" , "Round Table Knights sought the Holy ....." , "sought by Parsifal" , "Medieval knights sought the Holy . . . . ." .)