Socratic form of puzzle (8)
I believe the answer is:
'puzzle' is the definition.
(I've seen this before)
'socratic form' is the wordplay.
'form' is an anagram indicator (a different form of the same letters).
'socratic' anagrammed gives 'ACROSTIC'.
'of' is the link.
(Other definitions for acrostic that I've seen before include "Word puzzle using first letters" , "RAC stoic (anag) - lines of writing where certain initial letters form a word or proverb" , "Initial letter puzzle" , "Socratic sort of word puzzle" , "Form of word puzzle" .)