Move hastily, thus damage (4)
I believe the answer is:
tear
This clue could be a double definition.
'move' is the first definition.
(tear is a kind of move)
'hastily thus damage' is the second definition.
'tear' can be an answer for 'damage' (thesaurus). I am not sure about the 'hastily thus' bit.
Can you help me to learn more?
(Other definitions for tear that I've seen before include "A drop of optical moisture" , "Lacerate - sign of sorrow" , "Rip, sever roughly" , "Optical sign of sorrow" , "Secretion of the lacrymal glands" .)