They have a central meeting place (5)
I believe the answer is:
radii
'they have a central meeting place' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for radii that I've seen before include "Half-diameters" , "Veins of insect's wings" , "Spokes of a circle" , "more than one spoke" , "Half diameters" .)