Talked of part of a wheel (5)
I believe the answer is:
spoke
This clue is a double definition.
'talked' is the first definition.
('speak' can be a synonym of 'talk')
'part of a wheel' is the second definition.
('spoke' is part of 'wheel')
'of' is the link.
(Other definitions for spoke that I've seen before include "Said something" , "addressed" , "Wheel's radial member" , "Radiating rod" , "gave address" .)