Show one's support, as opposed to getting a broken toe (4)
I believe the answer is:
vote
'show one's support' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'opposed to getting a broken toe' is the wordplay.
'opposed to' becomes 'v' (abbreviation for versus).
'getting' means one lot of letters go next to another.
'a broken' is an anagram indicator.
'toe' with letters rearranged gives 'ote'.
'v'+'ote'='VOTE'
'as' is the link.
Can you help me to learn more?
(Other definitions for vote that I've seen before include "Poll" , "What suffragettes wanted" , "Register one's choice" , "Express choice" , "Decision by a majority" .)