More damaged in centre of Montreal quake (6)
I believe the answer is:
tremor
'quake' is the definition.
('tremor' can be a synonym of 'quake')
'more damaged in centre of montreal' is the wordplay.
'damaged' indicates anagramming the letters.
'in' means one lot of letters goes inside another.
'centre of' says to take the centre.
The centre of 'montreal' is 'tr'.
'more' is an anagram of 'remo'.
'remo' placed within 'tr' is 'TREMOR'.
(Other definitions for tremor that I've seen before include "A slight shake, perhaps of earth" , "Small vibration" , "Small quake" , "Quiver or vibration" , "Quaver" .)