Of the same length at one time, not now (2,6)
I believe the answer is:
no longer
'not now' is the definition.
(I've seen this before)
'of the same length at one time' is the wordplay.
I cannot really understand how this works, but
'of' could be 'o' and 'o' is found within the answer.
'length' could be 'r' (r is a kind of length) and 'r' is located in the answer.
'at' could be 'on' (location) and 'on' is found within the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for no longer that I've seen before include "Not as formerly" , "Someone who doesn't dream" , "a person without yearnings?" , "One not disposed to pining" .)