Bizarre, seeing laser moving around ancient city (7)
I believe the answer is:
surreal
'bizarre' is the definition.
(I've seen this in another clue)
'laser moving around ancient city' is the wordplay.
'moving' indicates anagramming the letters (letters are moved around).
'around' is an insertion indicator.
'ancient city' becomes 'ur' (ancient Sumerian city state).
'laser' anagrammed gives 'sreal'.
'sreal' going around 'ur' is 'SURREAL'.
'seeing' acts as a link.
(Other definitions for surreal that I've seen before include "strange" , "Dreamlike; like Dali's art" , "Dreamlike - Dali-like" , "Like the paintings of Rene Magritte" , "Weird; dreamlike" .)