Go back and make another concession? (6)
I believe the answer is:
recede
'go back' is the definition.
(I've seen this before)
'make another concession?' is the wordplay.
I cannot quite see how this works, but
'another' could be 're' (I've seen this in other clues) and 're' is found within the answer.
The remaining letters 'cede' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'and' is the link.
Can you help me to learn more?
(Other definitions for recede that I've seen before include "Move backward" , "Decline" , "Start balding" , "Go backwards" , "Go back, ebb" .)