Cookies (8)
(Other definitions for deputies that I've seen before include "Persons authorised to act as substitutes for others" , "Stand-ins or next-in command officials" , "Political representatives" .)
'cookies' is the definition.
('biscuit' can be a synonym of 'cookie')
This is the entire clue.
(Other definitions for biscuits that I've seen before include "Small flat sweet cakes" , "Custard creams, for example" , "In the US, they're cookies" , "Small thin crisp cakes" , "The call them cookies in the US" .)