Soap delayed? Missing one link (9)
I believe the answer is:
correlate
'link' is the definition.
(I know that correlate is a more specific form of the action link)
'soap delayed? missing one' is the wordplay.
'soap' becomes 'corrie' (nickname for TV soap Coronation Street).
'delayed?' becomes 'late' (running late).
'missing' is a deletion indicator.
'one' becomes 'i' (Roman numeral).
'corrie'+'late'='corrielate'
'corrielate' with 'i' taken away is 'CORRELATE'.
(Other definitions for correlate that I've seen before include "Establish a mutual relationship between (things)" , "Match" , "(Of two things) tally" , "To be linked to each other; trace role (anag.)" , "Be complementary" .)