Stubbornness from clubs during training seen to work (13)
I believe the answer is:
intransigence
'stubbornness' is the definition.
(I know that intransigence is a type of stubbornness)
'clubs during training seen to work' is the wordplay.
'clubs' becomes 'c' (abbreviation in card games).
'during' is an insertion indicator.
'to work' indicates an anagram (letters worked into a new order).
'training'+'seen'='trainingseen'
'trainingseen' with letters rearranged gives 'intransigene'.
'c' going within 'intransigene' is 'INTRANSIGENCE'.
'from' is the link.
(Other definitions for intransigence that I've seen before include "Stubbornness" , "Refusal to compromise or discuss" , "Refusal to change one's opinions" , "lack of flexibility" , "Stubborn refusal to compromise" .)