Talked of small elbow (5)
I believe the answer is:
spoke
'talked' is the definition.
('speak' can be a synonym of 'talk')
'small elbow' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'elbow' becomes 'poke' (I've seen this in another clue).
's'+'poke'='SPOKE'
'of' acts as a link.
(Other definitions for spoke that I've seen before include "addressed" , "Said something" , "Wheel's radial member" , "Radius" , "gave address" .)