Meet some splinter section (9)
I believe the answer is:
intersect
'meet' is the definition.
(intersecting is a kind of meeting)
'some splinter section' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'INTERSECT' is hidden in the letters of 'splinter section'.
(Other definitions for intersect that I've seen before include "Criss-cross" , "Divide into parts" , "Cut across" , "making one cross" , "Meet at a point" .)