Pretty young woman stood up friend (7)
I believe the answer is:
rosebud
'pretty young woman' is the definition.
(I've seen this before)
'stood up friend' is the wordplay.
'stood up' becomes 'rose' (I've seen this in other clues).
'friend' becomes 'bud' (shortly for buddy).
'rose'+'bud'='ROSEBUD'
(Other definitions for rosebud that I've seen before include "J. Foster Kane's last word" , "Unopened flower - pretty young woman" , "one with potential to bloom" , "Preminger film" , "Partly opened flower" .)