Length (8)
'length' is the definition.
(I have seen 'A length ' mean 'yard' so perhaps 'length' could also mean 'yard')
This is all the clue.
(Other definitions for yard that I've seen before include "3 feet" , "Old unit of length" , "American garden" , "short distance" , "area behind the house" .)
'length' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for span that I've seen before include "Bridge or range" , "Width of pans" , "Width of wings" , "Distance or interval between two points" , "Interval; pair of yoked oxen" .)
'length' is the definition.
(I know that length can be written as duration)
This is the entire clue.
(Other definitions for duration that I've seen before include "Around it (anag.)" , "Time scale" , "Length of time" , "Term, span, time" , "Period during which something continues" .)
'length' is the definition.
(I know that length can be written as distance)
This is all the clue.
(Other definitions for distance that I've seen before include "Length of space between one place and another" , "What's kept in reserve" , "Aloofness, reserve" , "Space between things" , "Ascend it from one point to another" .)