State of insensibility in chaotic US port (6)
I believe the answer is:
stupor
'state of insensibility' is the definition.
(I've seen this before)
'chaotic us port' is the wordplay.
'chaotic' indicates anagramming the letters.
'us'+'port'='usport'
'usport' is an anagram of 'STUPOR'.
'in' acts as a link.
(Other definitions for stupor that I've seen before include "state of unawareness" , "mental dullness?" , "Suspension of sensibility" , "Almost unconscious state" , "Mental torpor" .)