On the edge and somewhat alarming (8)
I believe the answer is:
marginal
'on the edge' is the definition.
(I've seen this before)
'somewhat alarming' is the wordplay.
'alarming' can be anagrammed to 'MARGINAL'.
However, I am not clear how this is indicated.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for marginal that I've seen before include "Borderline" , "Very slight in amount, at the edge" , "On the fringes" , "having small majority at risk" , "unsafe seat" .)