Training is going as intended (2,6)
I believe the answer is:
on course
I believe this clue is a double definition.
'training' is the first definition.
(on a training course)
'going as intended' is the second definition.
(on course means going as expected)
'is' is the link.
(Other definitions for on course that I've seen before include "at Muirfield" , "when receiving instruction?" , "Heading the right way" , "Following the correct route" , "making progress as expected" .)