Go ahead or go back to the page before (7)
I believe the answer is:
precede
'go ahead' is the definition.
(thesaurus)
'go back to the page before' is the wordplay.
'go back' becomes 'recede' (I've seen this before).
'to' means one lot of letters go next to another (I've seen this in other clues).
'the page before' becomes 'p' (I can't explain this - if you can you should believe this answer much more).
'recede' after 'p' is 'PRECEDE'.
'or' is the link.
Can you help me to learn more?
(Other definitions for precede that I've seen before include "Go in front" , "Occur before" , "Forerun" , "go before the others" , "Walk in front of" .)