Go on and on in given order travelling north (5)
I believe the answer is:
drone
'go on and on' is the definition.
'in given order travelling north' is the wordplay.
'in' indicates the answer is hidden within the clue.
'travelling north' is a reversal indicator (in a down clue, letters go up).
'enord' is hidden in the letters of 'given order'.
'enord' back-to-front is 'DRONE'.
(Other definitions for drone that I've seen before include "he gives us a buzz" , "Remote controlled aircraft" , "Bertie Wooster, say" , "Talk boringly; male bee" , "person averse to work" .)