Make mark in completion of list, say, with ‘Henry’ (4)
I believe the answer is:
etch
'make mark' is the definition.
'etch' can be an answer for 'mark' (I've seen this before). I'm unsure of the 'make' bit.
'completion of list say with henry' is the wordplay.
'completion of list say' becomes 'etc' (I can't justify this - if you can you should believe this answer much more).
'with' is a charade indicator (letters next to each other).
'henry' becomes 'H' (symbol for the unit of electrical inductance).
'etc'+'h'='ETCH'
'in' is the link.
Can you help me to learn more?
(Other definitions for etch that I've seen before include "Imprint vividly" , "Draw on metal with acid" , "Chase" , "Carve into metal with acid" , "Engrave (metal, glass etc.)" .)