Go back to the strangest creed on earth? (6)
I believe the answer is:
recede
'go back' is the definition.
(I've seen this before)
'the strangest creed on earth?' is the wordplay.
'the strangest' indicates anagramming the letters (I've seen 'strange' mean this).
'on' means one lot of letters go next to another.
'earth?' becomes 'e' ().
'creed' with letters rearranged gives 'reced'.
'reced'+'e'='RECEDE'
'to' acts as a link.
(Other definitions for recede that I've seen before include "Go back, ebb" , "Decline" , "Decree (anag) - ebb" , "Go backwards" , "Become more distant" .)