Clear EU caveat revised (8)
I believe the answer is:
evacuate
'clear' is the definition.
(thesaurus)
'eu caveat revised' is the wordplay.
'revised' is an anagram indicator.
'eu'+'caveat'='eucaveat'
'eucaveat' is an anagram of 'EVACUATE'.
(Other definitions for evacuate that I've seen before include "Clear inhabitants (from)" , "Withdraw from (a place)" , "flee" , "Completely empty" , "Move people from their homes" .)