Charlotte's discrimination shown in a brief device (5)
I believe the answer is:
agism
'charlotte's discrimination' is the definition.
'agism' can be an answer for 'discrimination' (agism is a kind of discrimination). I am not sure about the 'charlotte's' bit.
'a brief device' is the wordplay.
'brief' means to remove the last letter (a shorter or briefer version of the word).
'device' becomes 'gismo' (gismo can mean any device or gadget).
'gismo' with its last letter taken away is 'gism'.
'a'+'gism'='AGISM'
'shown in' is the link.
Can you help me to learn more?
(Other definitions for agism that I've seen before include "displaying this is not for the old" , "Prejudice against the grey" , "Form of prejudice" , "Showing prejudice" .)