Shouted support for that little bounder Ted (6)
I believe the answer is:
rooted
'shouted' is the definition.
Although both the answer and definition are past participle verbs, I cannot see how one could define the other.
'support for that little bounder ted' is the wordplay.
'support for' is a charade indicator (letters next to each other) (in a down clue, some letters 'support' others).
'that little bounder' becomes 'roo' (I've seen this in another clue).
'roo'+'ted' is 'ROOTED'.
Can you help me to learn more?
(Other definitions for rooted that I've seen before include "Firmly attached as plants are to ground" , "Fixed in place like plants in soil" , "Frivolousness" , "(Of new cutting) firmly established" , "Firmly established in a plantlike way" .)