United's second in draw delivers point (4)
I believe the answer is:
tine
'point' is the definition.
(I've seen this in another clue)
'united's second in draw' is the wordplay.
'united's second' becomes 'n' (ind letter of 'united').
'in' is an insertion indicator.
'draw' becomes 'tie' (synonyms).
'n' going within 'tie' is 'TINE'.
'delivers' is the link.
(Other definitions for tine that I've seen before include "(Fork's) prong" , "Slender prong of fork" , "Spike" .)