Leaders of unions now conduct urgent talks in full (5)
I believe the answer is:
uncut
'full' is the definition.
(I've seen this in another clue)
'leaders of unions now conduct urgent talks' is the wordplay.
'leaders of' says to take the initial letters.
The first letters of 'unions now conduct urgent talks' is 'UNCUT'.
'in' is the link.
(Other definitions for uncut that I've seen before include "(Of a diamond) rough" , "Not abridged" , "Complete, unabridged" , "Unexpurgated" , "Not truncated" .)