What about "very good knock" as a memorial? (7)
I believe the answer is:
epitaph
'a memorial?' is the definition.
(epitaph is a kind of memorial)
'what about very good knock as' is the wordplay.
'what' becomes 'eh' (I've seen this in other clues).
'about' is an insertion indicator.
'very good' becomes 'pi' (I've seen this in other clues).
'knock as' becomes 'tap' ('tap' can be a synonym of 'knock'. I am not sure about the 'as' bit.**).
'pi'+'tap'='pitap'
'eh' going around 'pitap' is 'EPITAPH'.
Can you help me to learn more?
(Other definitions for epitaph that I've seen before include "last words" , "Words on the defunct" , "Gravestone message" , "Grave words" , "message about late departure" .)