Puzzle given a couple of marks for wrong and right answers, we hear (8)
I believe the answer is:
acrostic
'puzzle' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
(Other definitions for acrostic that I've seen before include "Legal document" , "a little puzzling" , "Form of word puzzle" , "Initial letter puzzle" , "RAC stoic (anag) - lines of writing where certain initial letters form a word or proverb" .)