Attack US atlas (7)
I believe the answer is:
assault
'attack us atlas' is the definition.
'assault' can be an answer for 'attack' (synonyms). I'm not sure about the 'us atlas' bit.
'attack us atlas' is the wordplay.
'attack' indicates anagramming the letters.
'us'+'atlas'='usatlas'
'usatlas' with letters rearranged gives 'ASSAULT'.
Can you help me to learn more?
(Other definitions for assault that I've seen before include "Violent attack in action or words" , "The fool starts the attack" , "Physical attack" , "Attack associated with" , "raid" .)