A beauty who may go to the wall (3-2)
I believe the answer is:
pin-up
'a beauty who may go to the wall' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see an association between them that I can't see?
This is all the clue.
Can you help me to learn more?
(Other definitions for pin-up that I've seen before include "Alluring poster" , "Object of (sexual) admiration" , "Cover girl" , "Attach (to a notice board)" , "picture of heart-throb?" .)