Fork's point (4)
(Other definitions for tine that I've seen before include "Spike" , "(Fork's) prong" , "Slender prong of fork" .)
'fork's point' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for prong that I've seen before include "Something piercing" , "Spur; projecting part" , "Pointed end of fork" , "branch" , "Point of a fork" .)