Former, previous (3)
I believe the answer is:
old
This clue is a double definition.
'former' is the first definition.
(both can mean previous)
'previous' is the second definition.
(I've seen this in another clue)
(Other definitions for old that I've seen before include "No longer young" , "Advanced in years" , "Much-used" , "Former; aged" , "Ancient" .)