Strangely, older democracies don't like young leaders (5)
I believe the answer is:
oddly
'strangely' is the definition.
(I know that strangely can be written as oddly)
'older democracies don't like young leaders' is the wordplay.
'leaders' indicates taking the first letters.
The initial letters of 'older democracies dont like young' is 'ODDLY'.
(Other definitions for oddly that I've seen before include "This clue [32A] is not numbered so" , "in a curious way" , "Weirdly" , "not in the usual way" , "strange to say?" .)