Spelling in publication I see? (5)
I believe the answer is:
magic
'spelling' is the definition.
(use of spells)
'publication i see?' is the wordplay.
'publication' becomes 'mag' (abbreviation for magazine).
'see?' becomes 'C' (the word for the letter, according to Chambers).
'mag'+'i'+'c'='MAGIC'
'in' acts as a link.
(Other definitions for magic that I've seen before include "Entertainment at a children's party?" , "Tricks" , "Sorcery - conjuring" , "'Charms, spells, illusions (5)'" , "Superb" .)