Our suffrage definitely includes the old (4)
I believe the answer is:
aged
'the old' is the definition.
(I've seen this in another clue)
'our suffrage definitely includes' is the wordplay.
'includes' says the answer is hidden in the clue.
'AGED' is hidden in the letters of 'our suffrage definitely'.
(Other definitions for aged that I've seen before include "Matured like wine in wood" , "Geriatric" , "Getting on" , "Grew older" , "Senescent" .)