Rabble-rousing leader has women's group round the twist (6)
I believe the answer is:
writhe
'twist' is the definition.
(synonyms)
'rabble-rousing leader has women's group round the' is the wordplay.
'rabble-rousing leader has' becomes 'r' (I am not sure about this - if you are sure you should believe this answer much more).
'women's group' becomes 'wi' (Women's Institute).
'round' means one lot of letters goes inside another.
'r' going inside 'wi' is 'wri'.
'wri'+'the'='WRITHE'
Can you help me to learn more?
(Other definitions for writhe that I've seen before include "Twist in agony" , "worm" , "Painfully move" , "Twist as in pain" , "6, maybe in agony" .)