Number circulating in each state (11)
I believe the answer is:
anaesthetic
'number' is the definition.
(I've seen this before)
'circulating in each state' is the wordplay.
'circulating' indicates an anagram.
'in'+'each'+'state'='ineachstate'
'ineachstate' anagrammed gives 'ANAESTHETIC'.
(Other definitions for anaesthetic that I've seen before include "Number of bodies - can hesitate (anag)" , "used in theatre" , "Theatre number" , "A number of theatres" , "Knockout drug" .)