No longer fresh (5)
'no longer fresh' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stale that I've seen before include "Mouldy or hackneyed" , "Least (anag.)" , "Unfresh" , "no longer bearing interest?" , "Boring" .)
(Other definitions for old that I've seen before include "Venerable" , "At an early stage - at a late stage" , "Senescent" , "Much-used" , "Wild clematis" .)