Some of the media, working, waste no time (5,2)
I believe the answer is:
press on
'time' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how they can define each other.
'some of the media working waste no' is the wordplay.
I cannot really see how this works, but
'of' could be 'o' and 'o' is found within the answer.
'media' could be 'press' (the press is part of the media) and 'press' is located in the answer.
'no' could be 'n' (common abbreviation) and 'n' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for press on that I've seen before include "Continue going forward" , "Hasten insistently" , "don't stop!" , "Keep going forward" , "Continue (regardless)" .)