Make a mistake penning answer regularly? This might help (6)
I believe the answer is:
eraser
'might help' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'make a mistake penning answer regularly?' is the wordplay.
'make a mistake' becomes 'err' (to err is to make an error).
'penning' indicates putting letters inside.
'regularly?' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternate letters of 'answer' are 'ase'.
'err' enclosing 'ase' is 'ERASER'.
'this' is the link.
Can you help me to learn more?
(Other definitions for eraser that I've seen before include "Rubbing-out device" , "correction device" , "(Pencil, ink) rubber" , "It's used to rub out" , "Implement to rub out" .)