Get on and go along with you (5)
I believe the answer is:
agree
'get on' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for agree that I've seen before include "Settle" , "Be of one mind" , "Have the same idea" , "get on" , "See eye to eye" .)