Anxiously fixed louvres in city (9)
I believe the answer is:
nervously
'anxiously' is the definition.
(anxious can mean nervous or worried)
'fixed louvres in city' is the wordplay.
'fixed' indicates an anagram.
'in' is an insertion indicator.
'city' becomes 'ny' (short for New York).
'louvres' with letters rearranged gives 'ervousl'.
'ervousl' going into 'ny' is 'NERVOUSLY'.
(Other definitions for nervously that I've seen before include "In a state of apprehension" , "Showing apprehension" , "Edgily, uneasily," .)