All of Israel oddly neglected French runner (5)
I believe the answer is:
loire
'french runner' is the definition.
(loire is a french runner)
'all of israel oddly neglected' is the wordplay.
'oddly neglected' means one should take alternating letters.
'all'+'of'+'israel'='allofisrael'
The alternate letters of 'allofisrael' are 'LOIRE'.
(Other definitions for loire that I've seen before include "French river (Orleans, Tours, Nantes)" , "part of France" , "banker" , "valley famous for its wines" , "department in France" .)