Traded first diamonds terribly late (5)
I believe the answer is:
dealt
'traded' is the definition.
(I've seen this before)
'diamonds terribly late' is the wordplay.
'diamonds' becomes 'd' (abbreviation for the card suit diamonds).
'terribly' is an anagram indicator.
'late' with letters rearranged gives 'ealt'.
'd'+'ealt'='DEALT'
'first' is the link.
(Other definitions for dealt that I've seen before include "Gave out playing cards" , "Doled out" , "Delivered" , "Carried out business" , "Dispensed (cards)" .)