Time (4)
'time' is the definition.
(unit of time)
This is the entire clue.
(Other definitions for hour that I've seen before include "See 24" , "See 12" , "60 14 acrosses" , "A 24th of a day" , "Period of day" .)
(Other definitions for was that I've seen before include "Is no longer" , "Used to be" , "(He/she/it) existed" , "(I/he) existed" , "(I/he/she/it) existed" .)
(Other definitions for its that I've seen before include "Belonging to a particular thing" , "Sit (anag.)" , "The thing's" , "Neuter possessive pronoun" , "Another form of 'tis" .)