Long ago (4)
'long ago' is the definition.
(days of yore)
This is all the clue.
(Other definitions for yore that I've seen before include "Archaic word for long ago" , "Long ago (poetic)" , "Time long ago" , "Bygone time" , "Yesteryear" .)
'long ago' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for once that I've seen before include "not repeatedly" , "... upon a time for the storyteller" , "One-time musical film and song" , "Formerly - not repeated" , "At some former time" .)
'long ago' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for past that I've seen before include "Bygone" , "Days gone by" , "Beyond" , "Second visitor in 5 [A CHRISTMAS CAROL]" , "Ended" .)