Folded page and left to dine with editor (7)
I believe the answer is:
pleated
'folded' is the definition.
(pleating is a kind of folding)
'page and left to dine with editor' is the wordplay.
'page' becomes 'p'.
'and' is a charade indicator (letters next to each other).
'left' shows that the letters should be reversed in order.
'to dine with' becomes 'tael' (I can't explain this - if you can you should give a lot more credence to this answer).
'editor' becomes 'ed'.
'tael' backwards is 'leat'.
'p'+'leat'+'ed'='PLEATED'
Can you help me to learn more?
(Other definitions for pleated that I've seen before include "Folded and sewn" , "Given creases" , "Gathered" , "Folded and stitched" , "With folds sewn in" .)