In revolt -- Conservatives? Honest! (7)
I believe the answer is:
upright
'honest' is the definition.
(I've seen this before)
'in revolt conservatives?' is the wordplay.
'in revolt' becomes 'up' (I've seen this in other clues).
'conservatives?' becomes 'right' (right-wing people).
'up'+'right'='UPRIGHT'
(Other definitions for upright that I've seen before include "Honourable; erect" , "Joanna" , "not grand" , "Vertical like rugby goal post" , "support" .)