You get it going! (5)
I believe the answer is:
along
'you get it' is the definition.
I can't judge whether this defines the answer.
'going' is the wordplay.
I cannot really see how this works, but
'going' could be 'on' (both can mean functioning or activated) and 'on' is found in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for along that I've seen before include "From one end to the other" , "For the length of" , "(Going) in company (with others)" , "Lengthwise" , "Sea monster, opposite Charybdis" .)