Alarming result in closely fought seat (8)
I believe the answer is:
marginal
'seat' is the definition.
(I have seen 'unsafe seat' mean 'marginal' so perhaps 'seat' could also mean 'marginal')
'alarming result in' is the wordplay.
'result in' is an anagram indicator (I've seen 'resulting in' mean this).
'alarming' anagrammed gives 'MARGINAL'.
'closely fought' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for marginal that I've seen before include "On the fringes" , "On the edges of" , "having small majority at risk" , "Alarming (anag) - too small to matter" , "Borderline" .)