Choose to make a speech for the voters (10)
I believe the answer is:
electorate
'the voters' is the definition.
(I've seen this in another clue)
'choose to make a speech' is the wordplay.
'choose' becomes 'elect' (electing is a kind of choosing).
'to make a speech' becomes 'orate' (oratory is public speaking).
'elect'+'orate'='ELECTORATE'
'for' acts as a link.
(Other definitions for electorate that I've seen before include "Constituency" , "Voters as a whole" , "choosing body" , "Everyone choosing" , "Voters in general" .)