Looking back, covering a lot of historic city in particular (10)
I believe the answer is:
retrospect
'looking back' is the definition.
(I've seen this before)
'covering a lot of historic city in particular' is the wordplay.
'covering' means one lot of letters goes inside another.
'a lot of' means to remove the last letter (I've seen 'lots of' mean this (the majority of the word)).
'historic city' becomes 'troy' (ancient city).
'in particular' becomes 'respect' (both can mean a detail or matter for consideration. I am not sure about the 'in' bit.).
'troy' with its last letter taken away is 'tro'.
'tro' put within 'respect' is 'RETROSPECT'.
Can you help me to learn more?
(Other definitions for retrospect that I've seen before include "Survey of past events" , "Look at history" , "A backward view" , "Look(ing) back" , "Contemplation of the past" .)